通常情况下我们只能获取到包名，通过包名直接调起应用：
private void openAppWithPackageName(String packagename) {
// 通过包名获取此APP详细信息，包括Activities、services、versioncode、name等等
PackageInfo packageinfo =
null;
try {
packageinfo = getPackageManager().getPackageInfo(packagename
, 0)
;
}
catch (PackageManager.NameNotFoundException e) {
e.printStackTrace()
;
}
if (packageinfo ==
null) {
return;
}
// 创建一个类别为CATEGORY_LAUNCHER的该包名的Intent
Intent resolveIntent =
new Intent(Intent.
ACTION_MAIN, null)
;
resolveIntent.addCategory(Intent.
CATEGORY_LAUNCHER)
;
resolveIntent.setPackage(packageinfo.
packageName)
;
// 通过getPackageManager()的queryIntentActivities方法遍历
List<ResolveInfo> resolveinfoList = getPackageManager()
.queryIntentActivities(resolveIntent
, 0)
;
if (!resolveinfoList.iterator().hasNext()){
return ;
}
ResolveInfo resolveinfo = resolveinfoList.iterator().next()
;
if (resolveinfo !=
null) {
// packagename = 参数packname
String packageName = resolveinfo.
activityInfo.
packageName;
// 这个就是我们要找的该APP的LAUNCHER的Activity[组织形式：packagename.mainActivityname]
String className = resolveinfo.
activityInfo.
name;
// LAUNCHER Intent
Intent intent =
new Intent(Intent.
ACTION_MAIN)
;
intent.addCategory(Intent.
CATEGORY_LAUNCHER)
;
intent.setFlags(Intent.
FLAG_ACTIVITY_NEW_TASK | Intent.
FLAG_ACTIVITY_RESET_TASK_IF_NEEDED)
;//重点是加这个
// 设置ComponentName参数1:packagename参数2:MainActivity路径
ComponentName cn =
new ComponentName(packageName
, className)
;
intent.setComponent(cn)
;
startActivity(intent)
;
}
}
如果同时知道要调起应用的包名和类名，可以直接使用：
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);//重点是加这个ComponentName cn = new ComponentName(packageName, className);
intent.setComponent(cn); startActivity(intent);
