android启动其他应用的一段代码

private void startAppByPackageName(String packageName){

PackageInfo pi = null;

try {

pi = getPackageManager().getPackageInfo(packageName, 0);

} catch (NameNotFoundException e) {

e.printStackTrace();

}

Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);

resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);

resolveIntent.setPackage(pi.packageName);

List<ResolveInfo> apps = getPackageManager().queryIntentActivities(resolveIntent, 0);

ResolveInfo ri = apps.iterator().next();

if (ri != null ) {

String packageName1 = ri.activityInfo.packageName;

String className = ri.activityInfo.name;

Intent intent = new Intent(Intent.ACTION_MAIN);

intent.addCategory(Intent.CATEGORY_LAUNCHER);

ComponentName cn = new ComponentName(packageName1, className);

intent.setComponent(cn);

startActivity(intent);

}

}