android 设置应用程序默认值

Android中有时打开一个文件,系统会弹出一个应用程序选择列表供你选择.如果你把某个应用程序设为默认值,则不会弹出选择框,而会直接调用该程序.

设置方法如下:

   PackageManager pm = getPackageManager();
   IntentFilterfilter = new IntentFilter();
   filter.addCategory("android.intent.category.DEFAULT");
   ComponentName component = newComponentName("YourClearAppPakageName","YourClearAppClassName");
   ComponentName[] components = new ComponentName[]{new ComponentName("YourPreferAppPakageName","YourPreferAppClassName"), component};

   pm.clearPackagePreferredActivities("YourClearAppPakageName");
   pm.addPreferredActivity(filter,IntentFilter.MATCH_CATEGORY_EMPTY, components, component);

例如：修改系统默认Launhcer，但不是唯一的Launcher

PackageManager pm = getPackageManager();

IntentFilter filter = new IntentFilter();

filter.addAction("android.intent.action.MAIN");

 filter.addCategory("android.intent.category.HOME");

filter.addCategory("android.intent.category.DEFAULT");

  Context context = getApplicationContext();

 ComponentName component = new ComponentName(context.getPackageName(), TestReplaceHomeAppActivity.class.getName());  ComponentName[] components = new ComponentName[] {new ComponentName("com.android.launcher", "com.android.launcher.Launcher"), component};

pm.clearPackagePreferredActivities("com.android.launcher"); pm.addPreferredActivity(filter, IntentFilter.MATCH_CATEGORY_EMPTY, components, component);

==================

修改默认浏览器
PackageManager packageManager =context.getPackageManager(); String str1 = "android.intent.category.DEFAULT"; String str2 = "android.intent.category.BROWSABLE"; String str3 = "android.intent.action.VIEW";
//设置默认项的必须参数之一,用户的操作符合该过滤器时,默认设置起效 IntentFilter filter = new IntentFilter(str3); filter.addCategory(str1); filter.addCategory(str2); filter.addDataScheme("http"); //设置浏览页面用的Activity ComponentName component = new ComponentName(context .getPackageName(), BrowserActivity.class.getName());
Intent intent = new Intent(str3); intent.addCategory(str2); intent.addCategory(str1); Uri uri = Uri.parse("http://"); intent.setDataAndType(uri, null);
//找出手机当前安装的所有浏览器程序 List resolveInfoList = packageManager .queryIntentActivities(intent, PackageManager.GET_INTENT_FILTERS);
int size = resolveInfoList.size(); ComponentName[] arrayOfComponentName = newComponentName[size]; for (int i = 0; i < size; i++) { ActivityInfo activityInfo =resolveInfoList.get(i).activityInfo; String packageName = activityInfo.packageName; String className = activityInfo.name; //清除之前的默认设置 packageManager.clearPackagePreferredActivities(packageName); ComponentName componentName = newComponentName(packageName, className); arrayOfComponentName[i] = componentName; } packageManager.addPreferredActivity(filter, IntentFilter.MATCH_CATEGORY_SCHEME,arrayOfComponentName, component);

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