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);

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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);