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];
}
}