Android实现自适应屏幕的弹窗广告

package com.example.leixiansheng.addialog; import android.annotation.SuppressLint;import android.app.Dialog;import android.content.Context;import android.content.Intent;import android.graphics.Bitmap;import android.os.Bundle;import android.util.DisplayMetrics;import android.view.Gravity;import android.view.View;import android.view.Window;import android.view.WindowManager;import android.widget.ImageView;import android.widget.RelativeLayout;import android.widget.Toast; import com.bumptech.glide.Glide;import com.bumptech.glide.request.animation.GlideAnimation;import com.bumptech.glide.request.target.SimpleTarget; /** * Created by Leixiansheng on 2018/6/28. */ 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.FIT_XY); 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); }}

package com.example.leixiansheng.addialog; import android.support.v7.app.AppCompatActivity;import android.os.Bundle; import java.util.Random; 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]; }}