关于PendingIntent与Activity的例子

最新推荐文章于 2024-03-25 20:52:41 发布

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本文通过一个具体的 Android 应用示例，介绍了如何使用 PendingIntent 实现 Activity 间的跳转及动画效果，并展示了如何获取屏幕尺寸等实用功能。

package com.habby.sliderbar;

import android.app.Activity;
import android.app.PendingIntent;
import android.app.PendingIntent.CanceledException;
import android.content.Context;
import android.content.Intent;
import android.graphics.Canvas;
import android.os.Bundle;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.WindowManager;
import android.widget.TextView;

public class MainActivity extends Activity implements OnClickListener {
	private final String TAG = getClass().getSimpleName();
	
	private PendingIntent mPendingIntent;
	private Intent mIntent;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		TextView text = (TextView) findViewById(R.id.text);
		text.setClickable(true);
		text.setOnClickListener(this);
		
		mIntent = new Intent(MainActivity.this, SecondActivity.class);
		mIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		mPendingIntent = PendingIntent.getActivity(MainActivity.this, 0, mIntent, Intent.FLAG_ACTIVITY_NEW_TASK);
		
		DisplayMetrics dm = new DisplayMetrics();
		WindowManager wm = getWindowManager();
		wm.getDefaultDisplay().getMetrics(dm);
		Log.e(TAG, ""+dm.widthPixels+"/"+dm.heightPixels);
	}
	
    @Override
    public void onClick(View view) {
        switch (view.getId()) {
	case R.id.text:
	    try {
	        mPendingIntent.send(0, new Finish(), null);

                /** 这是方法在类似startAcitivity()或finish()后调用，完成Activity切换动画 */
		MainActivity.this.overridePendingTransition(R.anim.transition_right_enter, R.anim.acitivity_exit);
	    } catch (CanceledException e) {
	        e.printStackTrace();
	    }
	    break;
	default:
	    break;
	}
    }
	
	private class Finish implements PendingIntent.OnFinished {
		@Override
		public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 
				String resultData, Bundle resultExtras) {
			Log.e("Habby", "finished !!!");
		}
	}
	
	private class MyView extends View implements OnClickListener {
		public MyView(Context ctx, AttributeSet attrs) {
			super(ctx, attrs);
		}
		
		@Override
		public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
			super.onMeasure(widthMeasureSpec, heightMeasureSpec);
			setMeasuredDimension(widthMeasureSpec, heightMeasureSpec);
		}
		
		@Override
		public void onLayout(boolean changed, int left, int top, int right, int bottom) {
			super.onLayout(changed, left, top, right, bottom);
	    }
		
		@Override
		public void onDraw(Canvas canvas) {
			super.onDraw(canvas);
	    }
		
		@Override
		public void onClick(View view) {
		}
	}