50）dialog样式
51）开启一个提示音
52）从服务器获取json数据
53）创建txt文件，并向其写数据
54）获取状态栏高度
55）获取标题栏高度
56） 截屏代码
57） listview的点击变换背景色
58）自定义主题风格
59）最省代码的按钮监听
60） 在service中使用Toast的方法
61）最简单的等待窗
62） 手机拍照并保持图片
63）获取手机相册中缩略图和原始图
64）根据路径加载sd卡中的图片的方法
65） 加载一张本地高清大图的方法
66）点击两次返回退出
67） 自定义View 自适应宽高
68）将activity变为dialog代码
69）自定义Dialog时，可以给dialog设置自己的风格 R.style.my_tips_dialog
70）sd卡创建文件夹和保存文件
71）自画圆角矩形
72） 根据adapter中的数据来设置listview的高度
73） EditText 是否弹出软键盘的问题
74）UI界面使用EditText时，在注册文件中对该activity添加软键盘属性：
75） 善用Android预定义样式
76）view的抖动效果
77）activity的切换动画
78）listView的setOnItemClickListener方法中可以控制adapter中的组件
79）接口回调标准代码
80）Listview 点击item项后，让item常亮
81）点击组件背景白变灰色
82）自画button，有点击效果
83）View悬浮在所有View之上：

84. 获取res里图片资源的id的方法
    85）将dp转换为px
    86）一个TextView展示多行数据
    87）隐藏软键盘
    88）ToggleButton开关按钮的使用
    89） ObjectAnimator 创建动画
    90）开机自启动
    91）EditText inputType说明
    92）dip，px转换
    93）适配
    94） 动态添加布局
    95） 获取网络连接模式
    96）反射方法获取状态栏高度
    97）每隔一秒钟向主线程发送数据
    98）剪切（Clip）图像资源
    99）常用的一些系统属性
    100）如果sd卡存在就创建目录，如果没有就将目录创建在缓存

51）开启一个提示音
    private void initMusic() {

        Uri notification = RingtoneManager
                .getDefaultUri(RingtoneManager.TYPE_ALARM);
        r = RingtoneManager.getRingtone(getApplicationContext(), notification);
        if (r.isPlaying()) {
            r.stop();
        } else {
            r.play();
        }
    }

 52）从服务器获取Json数据
        HttpPost request = new HttpPost("http://rest.careyou360.com/FamilyRest/getFamilyState");
        JSONObject param = new JSONObject();
        try {
            param.put("restVersion", 1);
            param.put("platform", "android");
            param.put("familyId", "10000");
            param.put("userId", "10000");
            StringEntity se = new StringEntity(param.toString());  //绑定到请求 Entry
            request.setEntity(se);   
            // 发送请求  
            HttpResponse httpResponse = new DefaultHttpClient().execute(request);  
            //服务器返回的数据
            String retSrc = EntityUtils.toString(httpResponse.getEntity());
        }

53）创建txt文件，并向其写数据
    private void saveData() {
        if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
            File sdCardDir = Environment.getExternalStorageDirectory();
            
            File saveFile = new File(sdCardDir, "微心百源Ble名单.txt");
            FileOutputStream outStream;
            if(backbleList.size()>0&&backbleList!=null){
                try {
                    outStream = new FileOutputStream(saveFile,true);
                    for (int i = 0; i < backbleList.size(); i++) {
                        outStream.write(backbleList.get(i).getName().getBytes()); 
                        outStream.write(" : ".getBytes());
                        outStream.write(backbleList.get(i).getAddress().getBytes());
                        outStream.write("\n".getBytes());
                    }
                    outStream.close();
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } 
            }
        }else{
            Toast.makeText(this, "请插入sd卡", Toast.LENGTH_LONG).show();
        }
        
    }

  54）获取状态栏高度
  decorView是window中的最顶层view，可以从window中获取到decorView，然后decorView有个getWindowVisibleDisplayFrame方法可以获取到程序显示的区域，包括标题栏，但不包括状态栏。  
      Rect frame = new Rect();  
      getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);  
      int statusBarHeight = frame.top; 

  55）获取标题栏高度
     int contentTop = getWindow().findViewById(Window.ID_ANDROID_CONTENT).getTop();  
    //statusBarHeight是上面所求的状态栏的高度  
    int titleBarHeight = contentTop - statusBarHeight  


  56） 截屏代码
  
   private byte[] GetandSaveCurrentImage(){
        
        View view = this.getWindow().getDecorView();  
        view.setDrawingCacheEnabled(true);  
        view.buildDrawingCache();  
        Bitmap b1 = view.getDrawingCache();  
     // 获取状态栏高度  
        Rect frame = new Rect();  
        this.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);  
        int statusBarHeight = frame.top;  
        Log.i("TAG", "" + statusBarHeight);  
        
        int width = this.getWindowManager().getDefaultDisplay().getWidth();  
        int height = this.getWindowManager().getDefaultDisplay()  
                .getHeight();  
        Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height  
                - statusBarHeight); 
        view.destroyDrawingCache(); 
        
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        b.compress(Bitmap.CompressFormat.PNG, 100, baos);
        
        return baos.toByteArray();
        
    }

  public Bitmap ScreenShot(Activity context){
        // 获取windows中最顶层的view
        View view=context.getWindow().getDecorView();
        view.buildDrawingCache();
        
        // 获取状态栏高度
        Rect rect=new Rect();
        view.getWindowVisibleDisplayFrame(rect);
        int statusBarHeights = rect.top;
        Display display = context.getWindowManager().getDefaultDisplay();
        
        // 获取屏幕宽和高
        int widths = display.getWidth();
        int heights = display.getHeight();
        
        // 允许当前窗口保存缓存信息
        view.setDrawingCacheEnabled(true);
        
        // 去掉状态栏
        Bitmap bmp = Bitmap.createBitmap(view.getDrawingCache(), 0,
                statusBarHeights, widths, heights - statusBarHeights);
        
        // 销毁缓存信息
        view.destroyDrawingCache();
        return bmp;
    }
  




  57） listview的点击变换背景色

    android:listSelector="@drawable/record_item_selector"
  
    <selector
            xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_pressed="true" android:drawable="@color/gray" />
        <item android:drawable="@color/transparent" />
    </selector>


  58）自定义主题风格
     android:theme="@style/MyAppTheme" 

     theme.xml文件
      <resources xmlns:android="http://schemas.android.com/apk/res/android">
        <style name="MyAppTheme" parent="android:Theme">
            <item name="android:windowNoTitle">true</item>   //没有标题栏
             <item name="android:textSize">16sp</item>  //默认全局的字体大小
             <item name="android:textColor">@color/main_color</item>  //默认全局的字体颜色
             <item name="android:buttonStyle">@style/btnDefault</item>  //自定义按钮
             <item name="android:windowBackground">@color/main_background</item>  //默认activty的背景颜色
        </style>

        <style name="btnDefault">
            <item name="android:background">@drawable/btn_default_small_normal</item>
            <item name="android:layout_width">fill_parent</item>
            <item name="android:layout_height">40dp</item>
        </style>

    </resources>
      
59）最省代码的按钮监听  

  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/begin_record"
        android:layout_margin="10dp"
        android:layout_width="fill_parent"
        android:layout_height="40dp"
        android:onClick="doClick"
        android:text="@string/begin_record" />

    <Button
        android:id="@+id/stop_record"
        android:layout_margin="10dp"
        android:layout_width="fill_parent"
        android:layout_height="40dp"
        android:onClick="doClick"
        android:text="@string/stop_record" />
    

</LinearLayout>

   public void doClick(View view) {     
        switch (view.getId()) {
        case R.id.begin_record:
            Toast.makeText(getApplicationContext(), "开始录音", 1).show();
            break;
        case R.id.stop_record:
            Toast.makeText(getApplicationContext(), "停止录音", 1).show();
            break;
        
        }
    }


60） 在service中使用Toast的方法
   private void showMessage(final String msg){      
        mHandler.post(new Runnable() {
            
            @Override
            public void run() {
                Toast.makeText(BleConnectService.this, msg, 1).show();          
            }
        });
    }

61）最简单的等待窗
 
 mProgressDialog =ProgressDialog.show(getApplicationContext(), null, "正在加载.....");


62）手机拍照并保存图片

    intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "temp1.jpg")));
    this.startActivityForResult(intent, 1);


63）获取手机相册中缩略图和原始图

 获取缩略图：

 public void getThumbnail(){
     cr = this.getContentResolver();
     String[] projection = { Thumbnails._ID, Thumbnails.IMAGE_ID,
                Thumbnails.DATA };
     Cursor cursor = cr.query(Thumbnails.EXTERNAL_CONTENT_URI, projection,
                null, null, null);

     if(cur.moveToFirst()){
            int _id;
            int image_id;
            String image_path;
            int _idColumn = cursor.getColumnIndex(Thumbnails._ID);
            int image_idColumn = cursor.getColumnIndex(Thumbnails.IMAGE_ID);
            int dataColumn = cursor.getColumnIndex(Thumbnails.DATA);
            
            do{
                _id = cursor.getInt(_idColumn);
                image_id = cursor.getInt(image_idColumn);
                image_path = cursor.getString(dataColumn);
//              Log.i("TAG", image_path);
                Thumbnail nail=new Thumbnail();
                Log.i("TAG", image_id+"");
                nail.setImage_id(image_id+"");
                nail.setImage_path(image_path);
                list.add(nail);
            }while (cur.moveToNext());      
        }
 }


  根据缩略图id获取原始图:

     protected String getOriginalImagePath(String image_id) {
        String path = null;
        String[] projection = { Media._ID, Media.DATA };
        
        Cursor cursor = cr.query(Media.EXTERNAL_CONTENT_URI, projection,
                Media._ID + "=" + image_id, null, null);
        if (cursor != null) {
            cursor.moveToFirst();
            path = cursor.getString(cursor.getColumnIndex(Media.DATA));
        }
        return path;
    }


64）根据路径加载sd卡中的图片的方法
    Bitmap bm = BitmapFactory.decodeFile(filepath);
    //将图片显示到ImageView中
    img.setImageBitmap(bm);


65） 加载一张本地高清大图的方法：
// url是本地大图的sd卡位置
private Bitmap getoptBitmap(String url) {
        BitmapFactory.Options opts = new Options();
        opts.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(url,opts);
        // 从Options中获取图片的分辨率
        int imageHeight = opts.outHeight;
        int imageWidth = opts.outWidth;
        
        // 获取Android屏幕的服务
        WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
        int windowHeight = wm.getDefaultDisplay().getHeight();
        int windowWidth = wm.getDefaultDisplay().getWidth();
        
     // 计算采样率
        int scaleX = imageWidth / windowWidth;
        int scaleY = imageHeight / windowHeight;
        int scale = 1;
        if (scaleX > scaleY && scaleY >= 1) {
            scale = scaleX;
        }
        if (scaleX < scaleY && scaleX >= 1) {
            scale = scaleY;
        }
        
        opts.inJustDecodeBounds = false;
        opts.inSampleSize = scale;
        return BitmapFactory.decodeFile(url,opts);
    }
  

  66）点击两次返回退出

  public boolean onKeyDown(int keyCode, android.view.KeyEvent event) {
        if(keyCode == KeyEvent.KEYCODE_BACK){
             exitBy2Click();
        }
        return false;
    }
    private static Boolean isExit = false;  
    private void exitBy2Click() {
        Timer tExit = null;  
        if (isExit == false) {  
            isExit = true;  
            MCToast.show("再按一次退出程序", this);     
            tExit = new Timer();  
            tExit.schedule(new TimerTask() {  
                @Override  
                public void run() {  
                    isExit = false; 
                }  
            }, 2000); 
      
        } else {  
            finish();   
        }  
    };

67） 自定义View 自适应宽高
   @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int measuredHeight = measureHeight(heightMeasureSpec);
        int measuredWidth = measureWidth(widthMeasureSpec);
        setMeasuredDimension(measuredWidth, measuredHeight);
    }

    private int measureWidth(int measureSpec) {
        int specMode = MeasureSpec.getMode(measureSpec);
        int specSize = MeasureSpec.getSize(measureSpec);
        int result = XScale*data.size();
        if (specMode == MeasureSpec.AT_MOST){
            result = specSize;
        }else if(specMode == MeasureSpec.EXACTLY){
            result = specSize;
        }
        return result;
    }

    private int measureHeight(int measureSpec) {
        int specMode = MeasureSpec.getMode(measureSpec);
        int specSize = MeasureSpec.getSize(measureSpec);
        int result = 500;
        if (specMode == MeasureSpec.AT_MOST){
            result = specSize;
        }else if(specMode == MeasureSpec.EXACTLY){
            result = specSize;
        }
        return result;
    }


68）将activity变为dialog代码
    在注册文件中写android:theme="@style/loading_dialog"

<style name="loading_dialog" parent="@android:style/Theme.Dialog">
        <item name="android:windowFrame">@null</item>
        <item name="android:windowIsFloating">true</item>
        <item name="android:windowIsTranslucent">true</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:backgroundDimEnabled">true</item>
        <item name="android:windowBackground">@color/transparent</item>
    </style>


 69）自定义Dialog时，可以给dialog设置自己的风格 R.style.my_tips_dialog

    MyTipsDialog dialog = new MyTipsDialog(RecordActivity.this, R.style.my_tips_dialog);

    <style name="my_tips_dialog" parent="@android:Theme.Dialog">
        <item name="android:windowFrame">@null</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowBackground">@color/transparent</item>
        <item name="android:windowIsFloating">true</item>
        <item name="android:windowContentOverlay">@null</item>
    </style>


70）sd卡创建文件夹和保存文件
//创建文件夹
public class DataPathUtil {
    
    public static String getDataBasePath() {
        if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
            String parentPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/cwatch_cardio/";
            File tempFile = new File(parentPath);
            if (!tempFile.exists()) {
                tempFile.mkdirs();
            }
            return parentPath;
        }
        return null;
    }
}

recordFileName = DataPathUtil.getDataBasePath() + "BtData_"+ new Date().getTime() + ".dat";
File ecgFile = new File(recordFileName);
if(ecgFile!= null && ecgFile.exists()){
        ecgFile.delete();
}   


//创建文件
carmaCarfile = new File(DataPathUtil.getDataBasePath(), String.valueOf(System.currentTimeMillis())+ ".jpg");
    
  
 71）自画圆角矩形

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <!-- 点击效果 -->
    <item android:state_pressed="true">
        <shape>
            <!-- 填充 -->
            <solid android:color="@color/gray" />
            <!-- 描边  描边的宽度和描边的颜色值 -->
            <stroke android:width="1dp" android:color="@color/gray" />
            <!-- 圆角 -->
            <corners android:topLeftRadius="8dp" android:topRightRadius="8dp" />
            <!-- 设置各个方向的间隔 -->
            <padding android:bottom="0dp" android:left="10dp" android:right="10dp" android:top="0dp" />
        </shape>
    </item>
    
    <!-- 默认 -->
    <item>
        <shape>
            <solid android:color="@android:color/white" />
            <corners android:topLeftRadius="8dp" android:topRightRadius="8dp" />
        </shape>
    </item>
    
</selector>


72） 根据adapter中的数据来设置listview的高度

private void setListViewHeightBasedOnChildren(ExtendedListView listView) {
        ListAdapter listAdapter = listView.getAdapter();  //得到该listview的适配器数据多少
        if(listAdapter == null){
            return;
        }
        int totalHeight=0;
        for (int i = 0; i < listAdapter.getCount(); i++) {
            View listItem = listAdapter.getView(i, null, listView);     
            listItem.measure(0, 0);
            totalHeight += listItem.getMeasuredHeight();
        }
        ViewGroup.LayoutParams params = listView.getLayoutParams();
        params.height = totalHeight+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
        listView.setLayoutParams(params);
    }

73） EditText 是否弹出软键盘的问题

    1.想要一进入activity后，就弹出软键盘的方法是在注册文件activity下添加：
       android:windowSoftInputMode="stateVisible|adjustPan"

    2. 进入activity后，不弹出软键盘的方法是：
        一 在注册文件中添加：android:windowSoftInputMode="adjustUnspecified|stateHidden" 

        二 让Edittext失去焦点： EditText edit=(EditText)findViewById(R.id.edit); 
                                edit.clearFocus(); 
    
        三 强制隐藏Android输入法窗口
           EditText edit=(EditText)findViewById(R.id.edit); 
           InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE); 
           imm.hideSoftInputFromWindow(edit.getWindowToken(),0);

      3. 始终不弹出软件的方法：
            EditText edit=(EditText)findViewById(R.id.edit); 
            edit.setInputType(InputType.TYPE_NULL); 

74）UI界面使用EditText时，在注册文件中对该activity添加软键盘属性：
        android:windowSoftInputMode="adjustResize|stateHidden"
        adjustResize： 不修改界面  stateHidden：不自动弹出


75） 善用Android预定义样式

字体大小：
"?android:attr/textAppearanceLarge"，"?android:attr/textAppearanceMedium" ，"?android:attr/textAppearanceSmall"
 
 android:textAppearance="?android:attr/textAppearanceLarge" 或者
 style="?android:attr/textAppearanceLarge" 

字体颜色：
android:textColor="?android:attr/textColorPrimary" 
android:textColor="?android:attr/textColorSecondary" 
android:textColor="?android:attr/textColorTertiary" 
android:textColor="?android:attr/textColorPrimaryInverse" 
android:textColor="?android:attr/textColorSecondaryInverse"

分隔符：
 横向：
<View android:layout_width="fill_parent" 
      android:layout_height="1dip" 
      android:background="?android:attr/listDivider" />

 纵向：
<View android:layout_width="1dip" 
      android:layout_height="fill_parent" 
      android:background="?android:attr/listDivider" />
   
 CheckBox
    style="?android:attr/starStyle"
 类似标题栏效果的TextView
    style="?android:attr/listSeparatorTextViewStyle"
 其它有用的样式
    android:layout_height="?android:attr/listPreferredItemHeight"
    android:paddingRight="?android:attr/scrollbarSize"
    style="?android:attr/windowTitleBackgroundStyle"
    style="?android:attr/windowTitleStyle"
    android:layout_height="?android:attr/windowTitleSize"
    android:background="?android:attr/windowBackground"

76）view的抖动效果（左右抖动）
            TranslateAnimation anim = new TranslateAnimation(imageView.getWidth(),  
            imageView.getWidth() + 10, imageView.getHeight(), imageView.getHeight());  
            anim.setInterpolator(new CycleInterpolator(6f));  //循环次数  
                                   //CycleInterpolator：动画从开始到结束，变化率是循环给定次数的正弦曲线。  
            anim.setDuration( 500 );             //播放时间 

            magview.startAnimation(anim);



77）activity的切换动画② 
  ① 从右到左 →
  overridePendingTransition(R.anim.in_form_left, R.anim.out_of_right);

  in_form_left：
     <?xml version="1.0" encoding="utf-8"?>  
    <set xmlns:android="http://schemas.android.com/apk/res/android"   
        android:interpolator="@android:anim/accelerate_interpolator">  
        <translate   
            android:fromXDelta="-100%p"   
            android:toXDelta="0%p"  
            android:duration="500" />  
    </set>  
   out_of_right：
     <set xmlns:android="http://schemas.android.com/apk/res/android"   
        android:interpolator="@android:anim/accelerate_interpolator">  
        <translate   
            android:fromXDelta="0%p"   
            android:toXDelta="100%p"  
            android:duration="500" />  
    </set>  ④

  ① 从左到右 ←
  getActivity().overridePendingTransition(R.anim.in_from_right, R.anim.out_of_left);

  in_from_right：
     <?xml version="1.0" encoding="utf-8"?>  
     <set xmlns:android="http://schemas.android.com/apk/res/android"   
        android:interpolator="@android:anim/accelerate_interpolator">  
        <translate   
            android:fromXDelta="100%p"   
            android:toXDelta="0%p"  
            android:duration="500" />  
    </set>  
  out_of_left：
    <?xml version="1.0" encoding="utf-8"?>  
    <set xmlns:android="http://schemas.android.com/apk/res/android"   
        android:interpolator="@android:anim/accelerate_interpolator">  
        <translate   
            android:fromXDelta="0%p"   
            android:toXDelta="-100%p"  
            android:duration="500" />  
    </set>  

    
  ③ 上下切换：
     out_to_up.xml (从屏幕上面退出)
        <?xml version="1.0" encoding="utf-8"?>
        <translate xmlns:android="http://schemas.android.com/apk/res/android"
            android:interpolator="@android:anim/accelerate_interpolator"
            android:fromYDelta="0%p"
            android:toYDelta="-100%p"
            android:duration="1000">
        </translate>
    in_from_down.xml (从屏幕下面进入)
        <?xml version="1.0" encoding="utf-8"?>
        <translate xmlns:android="http://schemas.android.com/apk/res/android"
            android:interpolator="@android:anim/accelerate_interpolator"
            android:fromYDelta="100%p"
            android:toYDelta="0%p"
            android:duration="1000">
        </translate>
  ④

78）listView的setOnItemClickListener方法中可以控制adapter中的组件
     listView.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                View lastCheckedOption = view.findViewById(R.id.doctor_adapter_re);
                lastCheckedOption.setBackgroundColor(color.gray_alarm);
            }
        });


79）接口回调标准代码
 
    ① 通过方法的方式
    public interface OnListViewItemClik{
        void setItemClick(int position);
    }
    
    public void setListViewItemClik(OnListViewItemClik onclick){
        this.onclick=onclick;
    }

    ② 通过参数分方式
    private interface OnListViewItemClik{
        void setItemClick(int position);
    }

    public BleAdapter(List<BleDevice> bleList,OnBleConnectChangeListener listener ) {
        this.context=context;
        this.listener=listener;
    }   


80）Listview 点击item项后，让item常亮
  
   listView.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                if(((ListView)parent).getTag() != null){
                    ((View)((ListView)parent).getTag()).setBackgroundColor(Color.TRANSPARENT);
                }
                ((ListView)parent).setTag(view);
                view.setBackgroundColor(color.gray_alarm);
            }
        });


81）点击组件背景白变灰色
  <selector
  xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_pressed="true" android:drawable="@color/gray_white"></item>
    <item android:state_pressed="false" android:drawable="@color/white"></item>
</selector>

82）自画button，有点击效果

    <?xml version="1.0" encoding="utf-8"?>
    <selector
      xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:state_pressed="true">
            <shape android:shape="rectangle">
                <solid android:color="#18c2ed"/>
                <stroke android:width="1dp" android:color="#18c2ed"/>
                <corners android:radius="10dp" />
                <padding android:bottom="10dp" android:left="30dp" android:right="30dp" android:top="10dp"/>       
            </shape>
        </item>     
        <item android:state_pressed="false">
            <shape android:shape="rectangle">
                <stroke android:width="1dp" android:color="#FFFFFF"/>
                <corners android:radius="10dp" />
                <padding android:bottom="10dp" android:left="30dp" android:right="30dp" android:top="10dp"/>       
            </shape>    
        </item>     
    </selector>

83）View悬浮在所有View之上：
  
        WindowManager wm = (WindowManager) getApplicationContext()
                .getSystemService(WINDOW_SERVICE);
        WindowManager.LayoutParams wmParams = new WindowManager.LayoutParams();
        wmParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY; 
        wmParams.format = 1;
        wmParams.flags = LayoutParams.FLAG_NOT_TOUCH_MODAL | LayoutParams.FLAG_NOT_FOCUSABLE;;
        wmParams.width = 200;
        wmParams.height = WindowManager.LayoutParams.WRAP_CONTENT;;
        wm.addView(new Button(getApplicationContext()), wmParams); // 创建View


        <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>  


84) 获取res里图片资源的id的方法：
         level++；
         int resId=context.getResources().getIdentifier("v"+level, "drawable", context.getPackageName());
         mVoice.setImageResource(resId);


85）将dp转换为px
  mMenuRightPadding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50,
                              context.getResources().getDisplayMetrics());
  
86）一个TextView展示多行数据
    String str=new StringBuilder()
        .append("\n")
        .append("说明：").append("\n")
        .append("1.悬浮窗可随意移动").append("\n")
        .append("2.实时显示当前内存数据").append("\n")     
        .append("3.上层数据表示可用内存值").append("\n")
        .append("4.下层数据表示总内存值").append("\n")
        .append("5.点击悬浮窗出现关闭小图标可直接关闭").append("\n").append("\n").toString();
        tv.setText(str);     
        
87）隐藏软键盘
  private void hideKeyboard() {
        if(imm==null){
            imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE); 
        }
        if(imm.isActive()){
            imm.hideSoftInputFromWindow(heightEditText.getWindowToken() , 0); 
        }
    }
   
   有EditText的activity都要加这句话
   android:windowSoftInputMode="adjustUnspecified|stateHidden"

88）ToggleButton开关按钮的使用

        <style name="setting_toggle_button" parent="android:style/Theme">
                 <item name="android:layout_width">60dp</item>
                <item name="android:layout_height">32dp</item>
                <item name="android:layout_centerVertical">true</item>
                <item name="android:layout_alignParentRight">true</item>
                <item name="android:textOn">""</item>
                <item name="android:textOff">""</item>
                <item name="android:background">@drawable/setting_toggle_bg_sel</item>
                <item name="android:clickable">false</item>
         </style>

        setting_toggle_bg_sel.xml:
         <?xml version="1.0" encoding="utf-8"?>
        <selector xmlns:android="http://schemas.android.com/apk/res/android">
            <item android:drawable="@drawable/setting_item_unselected" android:state_checked="false"/>
            <item android:drawable="@drawable/setting_item_selected" android:state_checked="true"/>
        </selector>

        fitlerBWToggle.setChecked(value);

89） ObjectAnimator 创建动画

        /*
     * 执行一个动画
     */
    public void animClick(View v){  
        ObjectAnimator objAnimator=ObjectAnimator.ofFloat(imageView, "translationX", 0,100);
        objAnimator.setDuration(2000);
        objAnimator.setRepeatCount(10);
        objAnimator.setInterpolator(new LinearInterpolator());
        objAnimator.start();
    }
    
    /**
     * 两个动画同时执行
     */
    public void animClick(View v){  
        ObjectAnimator anim1 = ObjectAnimator.ofFloat(imageView, "scaleX",  
                1.0f, 2f);  
        ObjectAnimator anim2=ObjectAnimator.ofFloat(imageView, "alpha", 1f,0f);
        AnimatorSet animSet = new AnimatorSet();  
        animSet.setDuration(2000);  
        animSet.setInterpolator(new LinearInterpolator());  
        //两个动画同时执行  
        animSet.playTogether(anim1, anim2);  
        animSet.start();  
    }
    
    /** 
     * anim1，anim2,anim3同时执行 
     * anim4接着执行 
     */  
    public void animClick(View v){  
        float cx = imageView.getX();  
          
        ObjectAnimator anim1 = ObjectAnimator.ofFloat(imageView, "scaleX",1.0f, 2f);  
        ObjectAnimator anim2 = ObjectAnimator.ofFloat(imageView, "scaleY",1.0f, 2f);  
        ObjectAnimator anim3 = ObjectAnimator.ofFloat(imageView, "x",  cx ,  0f);  
        ObjectAnimator anim4 = ObjectAnimator.ofFloat(imageView,"translationX", 0,360f);  
        AnimatorSet animSet = new AnimatorSet();  
        animSet.play(anim1).with(anim2);  
        animSet.play(anim2).with(anim3);  
        animSet.play(anim4).after(anim3);  
        animSet.setDuration(1000);  
        animSet.start();  
    }


90）开机自启动

  开机后系统会发送一个启动完毕的广播，Intent.ACTION_BOOT_COMPLETED，
  那么我们只需要自定义一个BroadcastReciever接收这个广播，在接收到广播后启动我们的程序就可以实现开机启动了。

  public class MyBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (action.equals(Intent.ACTION_BOOT_COMPLETED)) {
            // 是否选择了开机启动
            boolean start = PreferenceManager.getDefaultSharedPreferences(
                    context).getBoolean(
                    CleanerActivity.KEY_START_WHEN_BOOT_COMPLETED, true);
            if (start) {
                Intent i = new Intent();
                i.setClass(context, FloatService.class);
                context.startService(i);
            }
        }
    }
}

    AndroidManifest.xml中的声明如下：
     <receiver android:name="MyBroadcastReceiver" >
                <intent-filter>
                    <action　　android:name="android.intent.action.BOOT_COMPLETED" />
                </intent-filter>
    </receiver>


91）EditText inputType说明

    android:inputType="textCapWords"//单词首字母大小
    android:inputType="textCapSentences"//仅第一个字母大小
    android:inputType="textAutoCorrect"android:inputType="textAutoComplete"//前两个自动完成
    android:inputType="textMultiLine"//多行输入
    android:inputType="textImeMultiLine"//输入法多行（不一定支持）
    android:inputType="textNoSuggestions"//不提示
    android:inputType="textUri"//URI格式
    android:inputType="textEmailAddress"//电子邮件地址格式
    android:inputType="textEmailSubject"//邮件主题格式
    android:inputType="textShortMessage"//短消息格式
    android:inputType="textLongMessage"android:inputType="textPersonName"//人名格式
    android:inputType="textPostalAddress"//邮政格式
    android:inputType="textPassword"//密码格式
    android:inputType="textVisiblePassword"//密码可见格式
    android:inputType="textWebEditText"//作为网页表单的文本格式
    android:inputType="textFilter"//文本筛选格式
    android:inputType="textPhonetic"//拼音输入格式
    android:inputType="number"//数字格式
    android:inputType="numberSigned"//有符号数字格式
    android:inputType="numberDecimal"//可以带小数点的浮点格式
    android:inputType="phone"//拨号键盘
    android:inputType="datetime"android:inputType="date"//日期键盘
    android:inputType="time"//时间键盘

92）dip，px转换
     public static int dip2px(Context context, float dipValue){ 
        final float scale = context.getResources().getDisplayMetrics().density; 
        return (int)(dipValue * scale + 0.5f); 
    } 
    public static int px2dip(Context context, float pxValue){ 
        final float scale = context.getResource().getDisplayMetrics().density; 
        return (int)(pxValue / scale + 0.5f); 
    } 
 
93）适配
       public static int getPhoneDpi(Context context){
            
            WindowManager wm = (WindowManager) context
                    .getSystemService(Context.WINDOW_SERVICE);
            DisplayMetrics dm = new DisplayMetrics();
            wm.getDefaultDisplay().getMetrics(dm);
            int densityDPI = dm.densityDpi;
            return densityDPI; 
            
        }
        int dip = DensityUtil.getPhoneDpi(context);
        if (dip >= 480) {  //dip是每英寸像素点（分为120低，160中，240高，320超高，480苹果分辨率）
            canvas.drawText(infoRect.top + 100, textPaint);
            
        } else {
            canvas.drawText(infoRect.top + 60, textPaint);
            
        }

94） 动态添加布局

     <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >

        <FrameLayout
            android:id="@+id/frameLayout"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent" >
        </FrameLayout>

    </LinearLayout>

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        FrameLayout fl=(FrameLayout)findViewById(R.id.frameLayout);  
        fl.addView(new MyView(this)); 
    
    }


95） 获取网络连接模式

        public class NetUtil {
        public static final int NETWORN_NONE = 0;
        public static final int NETWORN_WIFI = 1;
        public static final int NETWORN_MOBILE = 2;

        public static int getNetworkState(Context context) {
            ConnectivityManager connManager = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);

            // Wifi
            State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
                    .getState();
            if (state == State.CONNECTED || state == State.CONNECTING) {
                return NETWORN_WIFI;
            }

            // 3G
            state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)
                    .getState();
            if (state == State.CONNECTED || state == State.CONNECTING) {
                return NETWORN_MOBILE;
            }
            return NETWORN_NONE;
        }
    }

96）反射方法获取状态栏高度
      public static int getStatusBarHeight(Context context) {
        int statusBarHeight = 20;
        try {
            Class<?> _class = Class.forName("com.android.internal.R$dimen");
            Object object = _class.newInstance();
            Field field = _class.getField("status_bar_height");
            int restult = Integer.parseInt(field.get(object).toString());
            statusBarHeight = context.getResources().getDimensionPixelSize(
                    restult);
        } catch (Exception e) {
            e.printStackTrace();
        }
        // Toast.makeText(getActivity(), "StatusBarHeight = " + statusBarHeight,
        // Toast.LENGTH_SHORT).show();
        return statusBarHeight;
    }

97）每隔一秒钟向主线程发送数据
     mTimer = new Timer();
     mTimer.schedule(new TimerTask() {  
            @Override  
            public void run() {  
                Message message = new Message();  
                message.what = 1;  
                handler.sendMessage(message);  
            }  
        }, 1000, 1000);  /* 表示1000毫秒之後，每隔1000毫秒執行一次 */
  
    private Handler handler = new Handler() {  
        private int progress=0;

        @Override  
        public void handleMessage(Message msg) {  
            super.handleMessage(msg);  
            int msgId = msg.what;  
            switch (msgId) {  
                case 1:  
                    progress++;
                    if(progress==10){
                        mTimer.cancel();
                    }
                    break;   
            }  
        }  
    };  


98）剪切（Clip）图像资源
  剪切图像资源可以只显示一部分图像，这种资源经常被用在进度条的制作上。剪切图像资源是一个XML格式文件，资源只包含一个<clip>标签
    res/drawable/clip.xml
    <?xml version="1.0" encoding="utf-8"?> 
    <clip xmlns:android="http://schemas.android.com/apk/res/android" 
        android:drawable="@drawable/progress" android:clipOrientation="horizontal" 
        android:gravity="left" />

    <ImageView 
        android:id="@+id/image" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:background="@drawable/clip"/> 

    ImageView imageview = (ImageView) findViewById(R.id.image);  
    ClipDrawable drawable = (ClipDrawable) imageview.getBackground();  
    drawable.setLevel(3000)   level的范围为[0,10000]
  


99）常用的一些系统属性
    字体大小：
        style="?android:attr/textAppearanceLarge"
        style="?android:attr/textAppearanceMedium"
        style="?android:attr/textAppearanceSmall"
    字体颜色：
        android:textColor="?android:attr/textColorPrimary"
        android:textColor="?android:attr/textColorSecondary"
        android:textColor="?android:attr/textColorTertiary"
        android:textColor="?android:attr/textColorPrimaryInverse"
        android:textColor="?android:attr/textColorSecondaryInverse"
    分隔符 横向：
        <View
            android:layout_width="fill_parent"
            android:layout_height="1dip"
            android:background="?android:attr/listDivider" />
   
100）如果sd卡存在就创建目录，如果没有就将目录创建在缓存 

     public static String getCurrentDataPath(Context context, String folderName) throws IOException {
            String currentDataPath = "";
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                currentDataPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + folderName;
                File dir = new File(currentDataPath);
                if (!dir.exists())
                    dir.mkdir();
            } else {
                currentDataPath = context.getFilesDir().getAbsolutePath();
            }
            return currentDataPath;
        }