實作強制下線功能
1.首先建立一個Activity管理類
public class ActivityCollector {
public static List<Activity>activities=new ArrayList<>();
public static void addActivity(Activity activity){
activities.add(activity);
}
public static void removeActivity(Activity activity){
activities.remove(activity);
}
public static void finishAll(){
for(Activity activity:activities){
if(!activity.isFinishing()){
activity.finish();
}
}
}
}
2.然後BaseActivity類作為所有activity的父類
public class BaseActivity extends AppCompatActivity{
@Override
public void onCreate(@Nullable Bundle savedInstanceState, @Nullable PersistableBundle persistentState) {
super.onCreate(savedInstanceState, persistentState);
ActivityCollector.addActivity(this);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
ActivityCollector.removeActivity(this);
}
3.首頁設定一個模拟登入
public class MainActivity extends BaseActivity {
private EditText accountEdit;
private EditText passwordEdit;
private Button login;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
accountEdit=(EditText)findViewById(R.id.account);
passwordEdit=(EditText)findViewById(R.id.password);
login=(Button)findViewById(R.id.login);
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String account=accountEdit.getText().toString().trim();
String password=passwordEdit.getText().toString().trim();
//如果帳号是admin 密碼是123456
if(account.equals("admin")&&password.equals("123456")){
Intent intent=new Intent(MainActivity.this,SecondActivity.class);
startActivity(intent);
finish();
}else {
Toast.makeText(MainActivity.this,"帳秘錯誤",Toast.LENGTH_SHORT).show();
}
}
});
}
}
4跳轉到第二頁
第二頁是個按鈕,點選按鈕發送
public class SecondActivity extends BaseActivity {
Button mButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
mButton=(Button)findViewById(R.id.button2);
mButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent=new Intent("666");
sendBroadcast(intent);
}
});
}
}
然後我們在baseActivity中動态注冊BroadcastReceiver
public class BaseActivity extends AppCompatActivity{
private ForceOffLineReceiver receiver;
@Override
public void onCreate(@Nullable Bundle savedInstanceState, @Nullable PersistableBundle persistentState) {
super.onCreate(savedInstanceState, persistentState);
ActivityCollector.addActivity(this);
}
@Override
protected void onResume() {
super.onResume();
IntentFilter intentFilter=new IntentFilter();
intentFilter.addAction("666");
receiver=new ForceOffLineReceiver();
registerReceiver(receiver,intentFilter);
}
@Override
protected void onPause() {
super.onPause();
if(receiver!=null){
unregisterReceiver(receiver);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
ActivityCollector.removeActivity(this);
}
class ForceOffLineReceiver extends BroadcastReceiver{
@Override
public void onReceive(final Context context, Intent intent) {
AlertDialog.Builder builder=new AlertDialog.Builder(context);
builder.setTitle("warning");
builder.setMessage("異地登陸警告");
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
ActivityCollector.finishAll();
Intent intent1=new Intent(context,MainActivity.class);
context.startActivity(intent1);
}
});
builder.show();
}
}
}
例子比較簡單,現在看下EventBus