安卓弹窗广告（自适应屏幕）

image.png

image.png

内容：弹窗广告
特点：根据屏幕尺寸和原图片比例自适应
代码如下：

public class AdDialog extends Dialog implements View.OnClickListener {

    private Context context;
    private float finalWidth;       //最终宽度
    private float finalHeight;  //最终高度
    private int padding = 50;       //屏幕边距间隔
    private int picWidth;       //图片真实宽度
    private int picHeight;      //图片真实高度
    private String mUrl;


    public AdDialog(Context context,String url) {
        // 更改样式,把背景设置为透明的
        super(context, R.style.LocationDialogStyle);
        this.context = context;
        mUrl = url;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.dialog_ad);

        calculateHeightAndWidth();

        //初始化布局的位置
        initLayoutParams();
        setCancelable(false);
        setCanceledOnTouchOutside(false);
    }

    /**
     * 按实际图片比例对其的宽高进行缩放
     */
    private void calculateHeightAndWidth() {
        DisplayMetrics dm = context.getResources().getDisplayMetrics();
        final int screenWidth = dm.widthPixels;
        final int screenHeight = dm.heightPixels;

        //获取图片真正的宽高
        Glide.with(context)
                .load(mUrl)
                .asBitmap()//强制Glide返回一个Bitmap对象
                .into(new SimpleTarget<Bitmap>() {
                    @Override
                    public void onResourceReady(Bitmap bitmap, GlideAnimation<? super Bitmap> glideAnimation) {
                        picWidth = bitmap.getWidth();
                        picHeight = bitmap.getHeight();

                        if (picHeight > picWidth) {
                            //真实图片高度大于宽度时
                            finalHeight = screenHeight - padding * 2;
                            finalWidth = ((picWidth * 100) / picHeight) * finalHeight/100;
                        } else {
                            //真实图片宽度大于高度时
                            finalWidth = screenWidth - padding * 2;
                            finalHeight = ((picHeight * 100) / picWidth) * finalWidth/100;
                        }
                        if ((int) finalWidth > screenWidth || (int) finalHeight > screenHeight) {
                            //放大后的比例超出屏幕时
                            finalWidth = picWidth;
                            finalHeight = picHeight;
                        }
                        initAdView(finalWidth, finalHeight);
                    }
                });
    }

    @SuppressLint("ResourceType")
    private void initAdView(float width, float height) {
        RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.rl_ad);
        ImageView ivAd = new ImageView(context);
        ivAd.setScaleType(ImageView.ScaleType.CENTER_CROP);
        ivAd.setId(222);
        ivAd.setOnClickListener(this);
//      RelativeLayout.LayoutParams params1 = new RelativeLayout.LayoutParams(UIUtils.px2Dp((int) width), UIUtils.px2Dp((int) height));
        RelativeLayout.LayoutParams params1 = new RelativeLayout.LayoutParams((int) width, (int) height);
        params1.addRule(RelativeLayout.CENTER_HORIZONTAL);
        params1.setMargins(0, dp2Px(50), 0, 0);
        relativeLayout.addView(ivAd, params1);

        Glide
                .with(context)
                .load(mUrl)
                .crossFade()
                .into(ivAd);

        ImageView ivCancel = new ImageView(context);
        ivCancel.setId(333);
        ivCancel.setOnClickListener(this);
        ivCancel.setImageResource(R.drawable.icon_ad_close);
        RelativeLayout.LayoutParams params2 = new RelativeLayout.LayoutParams(dp2Px(30), dp2Px(30));
        params2.addRule(RelativeLayout.ALIGN_PARENT_TOP);
        params2.addRule(RelativeLayout.ALIGN_END,222);
        relativeLayout.addView(ivCancel,params2);
    }

    // 初始化布局的参数
    private void initLayoutParams() {
        // 布局的参数
        WindowManager.LayoutParams params = getWindow().getAttributes();
        params.gravity = Gravity.CENTER_HORIZONTAL | Gravity.CENTER;
        getWindow().setAttributes(params);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case 222:
                Toast.makeText(context, "你点击了广告，即将进入···",Toast.LENGTH_SHORT).show();
                dismiss();
                break;
            case 333:
                dismiss();
                break;
        }
    }

    public int dp2Px(int dp){
        /*
        1、px = dp * (dpi / 160)
        2、px/dp = density;//像素密度比
        */
        DisplayMetrics metrics = context.getResources().getDisplayMetrics();
//        int dpi = metrics.densityDpi;//获得当前设备的dpi ,像素密度
        float density = metrics.density;//密度比
        return (int) (density * dp + .5f);
    }
}

动态布局可参考我的文章：安卓动态布局
Main

public class MainActivity extends AppCompatActivity {

    private String[] adUrls = {"http://pic17.photophoto.cn/20101028/0017029521232265_b.jpg",
            "http://pic.58pic.com/58pic/13/56/51/95K58PICPFk_1024.jpg",
            "http://img5.imgtn.bdimg.com/it/u=1615585387,2628665620&fm=27&gp=0.jpg",
            "http://img1.imgtn.bdimg.com/it/u=1306190881,4135880992&fm=27&gp=0.jpg"};


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        randomAd();
        new AdDialog(this, randomAd()).show();
    }

    private String randomAd() {
        int i = (int) (Math.random() * (adUrls.length));        // 0 到 3  随机生成
        return adUrls[i];
    }
}

PS:当真实图片长度大于宽度时，图片可能距屏幕上方过近，自己修改padding值，或者增加setMargins的值即可。楼主就偷个懒啦，啊哈哈~~

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