它们的定义AlertDialog(二)-白红宇

先来看主页面布局

main_activity.xml里面仅仅有一个button(加入点击事件。弹出载入框)

再看MainActivity

package com.example.loadingdialog;import android.app.Activity;import android.os.Bundle;import android.view.View;public class MainActivity extends Activity{	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);				setContentView(R.layout.main_activity);		findViewById(R.id.button1).setOnClickListener(new View.OnClickListener() {						@Override			public void onClick(View v) {				LoadingDialog loadingDialog = new LoadingDialog(MainActivity.this);				loadingDialog.setCancelable(false);				loadingDialog.show();			}		});	}}

看载入框的布局文件

activity_custom_loding_dialog_layout.xml

LoadingDialog（里面有具体的凝视）

package com.example.loadingdialog;import android.app.Dialog;import android.content.Context;import android.os.Handler;import android.view.View;import android.view.animation.Animation;import android.view.animation.RotateAnimation;import android.widget.ImageView;import android.widget.TextView;public class LoadingDialog extends Dialog {	private static final int CHANGE_TITLE_WHAT = 1;	private static final int CHNAGE_TITLE_DELAYMILLIS = 300;	private static final int MAX_SUFFIX_NUMBER = 3;	private static final char SUFFIX = '.';		private ImageView iv_route;	private TextView tv;	private TextView tv_point;	private RotateAnimation mAnim;	private boolean cancelable = true;	/**	 * 定义一个handler,载入就发送一个即时消息，让原点+1,继而在每隔300毫秒发送一个延迟消息，来添加+1	 */	private Handler handler = new Handler(){		//正在载入的原点数量		private int num = 0;				public void handleMessage(android.os.Message msg) {			if (msg.what == CHANGE_TITLE_WHAT) {				StringBuilder builder = new StringBuilder();				if (num >= MAX_SUFFIX_NUMBER) {					num = 0;				}				num ++;				for (int i = 0;i < num;i++) {					builder.append(SUFFIX);				}				tv_point.setText(builder.toString());								if (isShowing()) {					handler.sendEmptyMessageDelayed(CHANGE_TITLE_WHAT, CHNAGE_TITLE_DELAYMILLIS);				} else {					num = 0;				}			}		};	};	public LoadingDialog(Context context) {		super(context, R.style.Dialog_bocop);		init();	}	private void init() {		View contentView = View.inflate(getContext(), R.layout.activity_custom_loding_dialog_layout, null);		setContentView(contentView);				contentView.setOnClickListener(new View.OnClickListener() {			@Override			public void onClick(View v) {				if (cancelable) {					dismiss();				}			}		});		iv_route = (ImageView) findViewById(R.id.iv_route);		tv = (TextView) findViewById(R.id.tv);		tv_point = (TextView) findViewById(R.id.tv_point);		/**动画初始化*/		initAnim();		//背景暗色		getWindow().setWindowAnimations(R.anim.alpha_in);	}			private void initAnim() {		mAnim = new RotateAnimation(360, 0,Animation.RESTART, 0.5f, Animation.RESTART,0.5f);		mAnim.setDuration(2000);		// 设置动画反复次数		mAnim.setRepeatCount(Animation.INFINITE);		//动画反复的模式--运行完第一次动画之后。回到动画開始然后运行第二次动画		mAnim.setRepeatMode(Animation.RESTART);		mAnim.setStartTime(Animation.START_ON_FIRST_FRAME);	}	@Override	public void show() {		iv_route.startAnimation(mAnim);		handler.sendEmptyMessage(CHANGE_TITLE_WHAT);		super.show();	}		@Override	public void dismiss() {		mAnim.cancel();		super.dismiss();	}			@Override	public void setCancelable(boolean flag) {		cancelable = flag;		super.setCancelable(flag);	}	}

再看super(context, R.style.Dialog_bocop);

背景色，无标题属性

在color.xml文件里

xml version="1.0" encoding="utf-8"?

> <resources> <color name="bocop_dialog_bg">#77000000</color> </resources>

接下来看这个getWindow().setWindowAnimations(R.anim.alpha_in);

alpha_in.xml（载入框之外是暗色）

xml version="1.0" encoding="utf-8"?> <alpha xmlns:android="http://schemas.android.com/apk/res/android" android:duration="1000" android:fromAlpha="1.0" android:toAlpha="0.0" > </alpha>

本文转自mfrbuaa博客园博客，原文链接：http://www.cnblogs.com/mfrbuaa/p/5050150.html，如需转载请自行联系原作者