更新的android桌面上的应用程序的快捷方式图标
转自:https://gist.github.com/xianminx/6110783
package com.example.dynamicappicon; import android.app.Activity; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.Bitmap.Config; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Rect; import android.graphics.Typeface; import android.graphics.drawable.BitmapDrawable; import android.os.Bundle; import android.view.Menu; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); installShortCut(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } private void installShortCut(){ Intent shortcutIntent = new Intent("com.android.launcher.action.INSTALL_SHORTCUT"); shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME, getString(R.string.app_name)); // 是否可以有多个快捷方式的副本,参数如果是true就可以生成多个快捷方式,如果是false就不会重复添加 shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON, generatorContactCountIcon(((BitmapDrawable)(getResources().getDrawable(R.drawable.ic_launcher))).getBitmap())); shortcutIntent.putExtra("duplicate", false); Intent mainIntent = new Intent(Intent.ACTION_MAIN); mainIntent.addCategory(Intent.CATEGORY_LAUNCHER); // 要删除的应用程序的ComponentName,即应用程序包名+activity的名字 //intent2.setComponent(new ComponentName(this.getPackageName(), this.getPackageName() + ".MainActivity")); mainIntent.setClass(this, this.getClass()); shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, mainIntent); //shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, Intent.ShortcutIconResource.fromContext(this, R.drawable.icon)); shortcutIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON, generatorContactCountIcon(((BitmapDrawable)(getResources().getDrawable(R.drawable.ic_launcher))).getBitmap())); sendBroadcast(shortcutIntent); } private Bitmap generatorContactCountIcon(Bitmap icon){ //初始化画布 int iconSize=(int)getResources().getDimension(android.R.dimen.app_icon_size); Bitmap contactIcon=Bitmap.createBitmap(iconSize, iconSize, Config.ARGB_8888); Canvas canvas=new Canvas(contactIcon); //拷贝图片 Paint iconPaint=new Paint(); iconPaint.setDither(true);//防抖动 iconPaint.setFilterBitmap(true);//用来对Bitmap进行滤波处理,这样,当你选择Drawable时,会有抗锯齿的效果 Rect src=new Rect(0, 0, icon.getWidth(), icon.getHeight()); Rect dst=new Rect(0, 0, iconSize, iconSize); canvas.drawBitmap(icon, src, dst, iconPaint); //在图片上创建一个覆盖的联系人个数 int contacyCount=11; //启用抗锯齿和使用设备的文本字距 Paint countPaint=new Paint(Paint.ANTI_ALIAS_FLAG|Paint.DEV_KERN_TEXT_FLAG); countPaint.setColor(Color.RED); countPaint.setTextSize(20f); countPaint.setTypeface(Typeface.DEFAULT_BOLD); canvas.drawText(String.valueOf(contacyCount), iconSize-18, 25, countPaint); return contactIcon; } }