来源: 互联网  发布时间: 2014-02-18

给图片的边缘加上光晕

ImageView v = (ImageView)findViewById(R.id.image);//一定要给ImageView加上几个像素的Padding，要不然效果出来不了
Paint p= new Paint();
p.setColor(Color.RED);//红色的光晕
BitmapDrawable bd = (BitmapDrawable) v.getDrawable();
		Bitmap b = bd.getBitmap();
		Bitmap bitmap = Bitmap.createBitmap(bd.getIntrinsicWidth(), bd.getIntrinsicHeight(), Config.ARGB_8888);
		Canvas canvas = new Canvas(bitmap);
		canvas.drawBitmap(b.extractAlpha(), 0, 0, p);
		
		StateListDrawable sld = new StateListDrawable();
		sld.addState(new int[]{android.R.attr.state_pressed}, new BitmapDrawable(bitmap));
		
		v.setBackgroundDrawable(sld);

参考http://gundumw100.iteye.com/blog/1205547#comments

    

    来源: 互联网  发布时间: 2014-02-18

捕获Home键按下
在Activity界面重写onAttachedToWindow方法

@Override  
	public void onAttachedToWindow() {
		this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);  
		super.onAttachedToWindow();
	}

switch (keyCode) {
    	case KeyEvent.KEYCODE_HOME:
    		Log.i(TAG,"KEYCODE_HOME");
    		Toast.makeText(Test1Activity.this, "你按下了Home键", Toast.LENGTH_SHORT).show();
    		return true;

    

    来源: 互联网  发布时间: 2014-02-18

Activity之间切换的各种效果(遗憾没有3D的效果)(转载)
下面的Demo是我找到的一个觉得用来在程序中进行Activity之间切换的很好的一个例子:

package com.asai.android.demo;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;

public class demoMain extends Activity {
private Button btnDemo;
private Spinner sprAnim;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

btnDemo = (Button) findViewById(R.id.btnDemo);
sprAnim = (Spinner) findViewById(R.id.sprAnim);
//Spinner的内容适配器
ArrayAdapter<?> animType = ArrayAdapter.createFromResource(this,
R.array.anim_type, android.R.layout.simple_spinner_item);
animType.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
sprAnim.setAdapter(animType);
//默认选中第一项
sprAnim.setSelection(0);
btnDemo.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
startActivity(new Intent(demoMain.this, demoDetail.class));
switch (sprAnim.getSelectedItemPosition()) {
case 1:
//淡入淡出效果 

overridePendingTransition(R.anim.fade, R.anim.hold);
break;
case 2:
overridePendingTransition(R.anim.alpha_rotate,
R.anim.my_alpha_action);
break;
case 3:
overridePendingTransition(R.anim.alpha_scale_rotate,
R.anim.my_alpha_action);
break;
case 4:
overridePendingTransition(
R.anim.alpha_scale_translate_rotate,
R.anim.my_alpha_action);
break;
case 5:
overridePendingTransition(R.anim.alpha_scale_translate,
R.anim.my_alpha_action);
break;
case 6:
//中心放大效果

overridePendingTransition(R.anim.alpha_scale,
R.anim.my_alpha_action);
break;
case 7:
overridePendingTransition(R.anim.alpha_translate_rotate,
R.anim.my_alpha_action);
break;
case 8:
overridePendingTransition(R.anim.alpha_translate,
R.anim.my_alpha_action);
break;
case 9:
overridePendingTransition(R.anim.my_rotate_action,
R.anim.my_alpha_action);
break;
case 10:
overridePendingTransition(R.anim.my_scale_action,
R.anim.my_alpha_action);
break;
case 11:
overridePendingTransition(R.anim.my_translate_action,
R.anim.my_alpha_action);
break;
case 12:
overridePendingTransition(R.anim.myanimation_simple,
R.anim.my_alpha_action);
break;
case 13:
overridePendingTransition(R.anim.myown_design,
R.anim.my_alpha_action);
break;
case 14:
overridePendingTransition(R.anim.scale_rotate,
R.anim.my_alpha_action);
break;
case 15:
overridePendingTransition(R.anim.scale_translate_rotate,
R.anim.my_alpha_action);
break;
case 16:
overridePendingTransition(R.anim.scale_translate,
R.anim.my_alpha_action);
break;
case 17:
overridePendingTransition(R.anim.translate_rotate,
R.anim.my_alpha_action);
break;
case 18:
overridePendingTransition(R.anim.hyperspace_in,
R.anim.hyperspace_out);
break;
case 19:
overridePendingTransition(R.anim.shake,
R.anim.my_alpha_action);
break;
case 20:
overridePendingTransition(R.anim.push_left_in,
R.anim.push_left_out);
break;
case 21:
//从下方移出效果 overridePendingTransition(R.anim.push_up_in,
R.anim.push_up_out);
break;
case 22:
overridePendingTransition(R.anim.slide_left,
R.anim.slide_right);
break;
case 23:
overridePendingTransition(R.anim.slide_top_to_bottom,
R.anim.my_alpha_action);
break;
case 24:
overridePendingTransition(R.anim.wave_scale,
R.anim.my_alpha_action);
break;
}
}
});
}
}

另外一个activity可以自己随便写个,这里还用到了就是arrays.xml作为Spinner的适配器:

<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="anim_type">
<item>zoom_enter</item>
<item>fade</item>
<item>alpha_rotate</item>
<item>alpha_scale_rotate</item>
<item>alpha_scale_translate_rotate</item>
<item>alpha_scale_translate</item>
<item>alpha_scale</item>
<item>alpha_translate_rotate</item>
<item>alpha_translate</item>
<item>my_rotate_action</item>
<item>my_scale_action</item>
<item>my_translate_action</item>
<item>myanimation_simple</item>
<item>myown_design</item>
<item>scale_rotate</item>
<item>scale_translate_rotate</item>
<item>scale_translate</item>
<item>translate_rotate</item>
<item>hyperspace_in</item>
<item>shake</item>
<item>push_left_in</item>
<item>push_up_in</item>
<item>slide_left</item>
<item>slide_top_to_bottom</item>
<item>wave_scale</item>
</string-array>
</resources>

相信这段代码我不用解释应该也看的懂:改变y坐标来实现动画效果;
相对应的就是:
push_up_out.xml:

<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate android:fromYDelta="0" android:toYDelta="-100%p" android:duration="300"/>
<alpha android:fromAlpha="1.0" android:toAlpha="0.0" android:duration="300" />
</set>

里面实在太多了,我直接贴上附件,需要的可以自己下了学习