Android启动和关闭Activity

一、启动activity

// 应用的主activity类
PackageManager packageManager = context.getPackageManager();
String pkg = context.getPackageName();
intent = packageManager.getLaunchIntentForPackage(pkg);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);

二、关闭activity

//方法一
System.exit(0);
//方法二
context.unregisterReceiver(this);
((Activity) context).finish();
//方法三
ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
String pkg = context.getPackageName();
manager.killBackgroundProcesses(pkg);
//方法四
android.os.Process.killProcess(android.os.Process.myPid());
//方法五
String pkg2 = context.getPackageName();
manager.restartPackage(pkg2);