安卓弹窗广告（自适应屏幕）

转载请注明出处：https://blog.csdn.net/mr_leixiansheng/article/details/81062588

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：

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() {
					@Override
					public void onResourceReady(Bitmap bitmap, GlideAnimation 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

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];
	}
}

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~~