跳转方式

a、显示跳转

• 显示方式一

    Intent intent=new Intent(context,SecondeActivity.class);   
    startActivity(intent);
  

• 显示方式二

   Intent intent=new Intent();   
   intent.setClass(context,SecondeActivity.class);
   startActivity(intent);
  

• 显示方式三

   Intent intent=new Intent();   
   intent.setComponent(new ComponentName(context, SecondeActivity.class));
   startActivity(intent);
  

b、隐示跳转

Action跳转

• 界面代码

   Intent intent = new Intent();
   intent.setAction("com.test.seconde");
   startActivity(intent);
  

• AndroidManifest代码

   <activity android:name=".activity.startway.BActivity">
        <intent-filter>
              <action android:name="com.test.seconde" />
              <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
   </activity>
  

Scheme跳转

• 介绍

  URL Scheme协议格式:scheme://host:port/path  　　模式://主机:端口/路径 
  

• 样例

   myapp://user:8080/userinfo?userId=1234
  

• 参数

   myapp        指Scheme 的名字
   user         指Scheme 的地址
   8080         指端口号
   userinfo     指跳转的页面
   userid       指传递的参数
  

• Activity跳转代码

  Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("myapp://user:8080/userinfo?userid=1234"));
  startActivity(intent);
  

• 网页跳转（使用系统自带浏览器或者谷歌浏览器）

  <a href="myapp://user:8080/userinfo?userid=1234">用户详情</a>
  

• AndroidManifest代码

  <activity android:name=".activity.startway.BActivity">
        <intent-filter>
            <data
                android:host="user"
                android:path="/userinfo"
                android:port="8080"
                android:scheme="myapp" />
            <category android:name="android.intent.category.DEFAULT" />
            <action android:name="android.intent.action.VIEW" />
            <category android:name="android.intent.category.BROWSABLE" />
        </intent-filter>
    </activity>
  

• Activity接收代码

  Uri uri = getIntent().getData();
  
  String url = uri.toString();
  
  // scheme值
  String scheme = uri.getScheme();
  
  // host值
  String host = uri.getHost();
  
  //port值
  int port = uri.getPort();
  
  // 访问路劲
  String path = uri.getPath();
  
  List<String> pathSegments = uri.getPathSegments();
  // Query值
  String query = uri.getQuery();
  
  //获取指定参数值
  String userid = uri.getQueryParameter("userid");
  

• 额外判断

  PackageManager packageManager = getPackageManager();
  Intent intent = new Intent(Intent.ACTION_VIEW, 
  Uri.parse("myapp://user:8080/userinfo?userid=1234"));
  List<ResolveInfo> activities = packageManager.queryIntentActivities(intent, 0);
  boolean isHas = !activities.isEmpty();
  if (isHas) {
    startActivity(intent);
  }