java包名判断应用是否存在_Android判断应用是否存在

Android判断应用是否存在

文章分类:移动开发

通过包名判断

Java代码

public boolean checkBrowser(String packageName) {

if (packageName == null || "".equals(packageName))

return false;

try {

ApplicationInfo info = getPackageManager().getApplicationInfo(

packageName, PackageManager.GET_UNINSTALLED_PACKAGES);

return true;

} catch (NameNotFoundException e) {

return false;

}

}

判断包中的Activity

Java代码

Intent intent = new Intent(Intent.ACTION_VIEW);

intent.setClassName("com.android.settings", //$NON-NLS-1$

"com.android.settings.InstalledAppDetails"); //$NON-NLS-1$

intent.putExtra("com.android.settings.ApplicationPkgName", //$NON-NLS-1$

mCurrentPkgName);

List acts = getPackageManager().queryIntentActivities(

intent, 0);

if (acts.size() > 0) {

startActivity(intent);

} else {

Toast.makeText(this,

getString(R.string.failed_to_resolve_activity),

Toast.LENGTH_SHORT).show();

}