在实际开发中，常有需求在程序启动第三方APP，直接上代码：
private void openOtherAPP(Context context, String packageName) {
PackageManager pm = context.getPackageManager();
try {
PackageInfo pi = pm.getPackageInfo(packageName, 0);
if (pi != null) {
Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);
resolveIntent.setPackage(pi.packageName);
List<ResolveInfo> apps = pm.queryIntentActivities(resolveIntent, 0);
ResolveInfo ri = apps.iterator().next();
if (ri != null) {
String pName = ri.activityInfo.packageName;
String className = ri.activityInfo.name;
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
ComponentName cn = new ComponentName(pName, className);
intent.setComponent(cn);
context.startActivity(intent);
}
}
} catch (NameNotFoundException e) {
e.printStackTrace();
}
}