在系統裡設定檔案預設開啟APP
阿新 • • 發佈:2018-12-13
在系統裡設定檔案預設開啟APP
public boolean setPreferredActivity(String packName,String clsName,Uri uri,String type){
PackageManager packageManager = mContext.getPackageManager();
String str1 = "android.intent.category.DEFAULT";
String str3 = "android.intent.action.VIEW" ;
// 設定預設項的必須引數之一,使用者的操作符合該過濾器時,預設設定起效
IntentFilter filter = new IntentFilter(str3);
filter.addCategory(str1);
try {
filter.addDataType(type);
} catch (MalformedMimeTypeException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ComponentName component = new ComponentName(packName, clsName);
Intent intent = new Intent(str3);
intent.addCategory(str1);
intent.setDataAndType(uri, type);
List<ResolveInfo> resolveInfoList = packageManager
.queryIntentActivities(intent,
PackageManager.GET_INTENT_FILTERS);
int size = resolveInfoList.size();
ComponentName[] arrayOfComponentName = new ComponentName[size];
int bestMatch = -1;
for (int i = 0; i < size; i++) {
ActivityInfo activityInfo = resolveInfoList.get(i).activityInfo;
String packageName = activityInfo.packageName;
String className = activityInfo.name;
int uid = resolveInfoList.get(i).activityInfo.applicationInfo.uid;
int match = resolveInfoList.get(i).match;
Log.e(Tag, packageName+"/"+className+"/"+uid+"/"+match);
if(packageName.equals(packName)){
bestMatch = match;
}
// 清除之前的預設設定
packageManager.clearPackagePreferredActivities(packageName);
ComponentName componentName = new ComponentName(packageName,
className);
arrayOfComponentName[i] = componentName;
}
if(bestMatch<0){
packageManager.addPreferredActivity( filter,
IntentFilter.MATCH_CATEGORY_SCHEME, arrayOfComponentName, component,
UserHandle.getCallingUserId());//解決第一次呼叫不生效問題
return false;
}else{
packageManager.addPreferredActivity(filter,
bestMatch, arrayOfComponentName,
component,UserHandle.getCallingUserId());
return true;
}
}
這是設定預設的視訊播放器
public boolean setPreferredActivityOfVideo(String packName,String clsName){
boolean result = false;
Cursor cur = mContext.getContentResolver().query(
Media.EXTERNAL_CONTENT_URI, null, null, null, null);
int pathIndex = cur.getColumnIndex(Media.DATA);
if(cur.moveToFirst()){
String path = cur.getString(pathIndex);
Uri uri = Uri.fromFile(new File(path));
result = setPreferredActivity(packName, clsName, uri, "video/*");
}
cur.close();
return result;
}
記得 <uses-permission android:name="android.permission.SET_PREFERRED_APPLICATIONS" /> 及系統簽名噢