dialog设置透明度 activity设置透明度

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作了两个dialog，想设置第二个透明些，即从第二个dialog上能看到其下面的第一个dialog的内容，找到一个设置，试了一下不错，方法如下：

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WindowManager.import com.hzilearning.dict.activity.R;import android.app.Activity;import android.content.Intent;import android.graphics.Bitmap;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.view.WindowManager;import android.widget.TextView;/** * 按M图片跳出来的一个选择框 * * @author endual * */public class JumpMenuActivity extends Activity {private TextView tv_jumpmenu_newword;private TextView tv_jumpmenu_important;private TextView tv_jumpmenu_mastered;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);this.setContentView(R.layout.jumpmenu);this.setTitle(null) ;WindowManager.LayoutParams lp = getWindow().getAttributes();lp.alpha=0.8f;getWindow().setAttributes(lp);tv_jumpmenu_newword = (TextView) this.findViewById(R.id.tv_jumpmenu_newword);tv_jumpmenu_important = (TextView) this.findViewById(R.id.tv_jumpmenu_important);tv_jumpmenu_mastered = (TextView) this.findViewById(R.id.tv_jumpmenu_mastered);this.tv_jumpmenu_newword.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent intent = new Intent();intent.setClass(JumpMenuActivity.this,LearnWordListTabActivity.class);startActivity(intent);}});。。。。。。。。。。。。 ?

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1. this.setTitle(null)?; ? //设置的标题
2. ????????WindowManager.LayoutParams?lp?=?getWindow().getAttributes();??
3. ????????lp.alpha=0.8f;??
4. ????????getWindow().setAttributes(lp);??
5. ? ? ? ?

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