[英]Finish All Activities from BroadCast Receiver
屏幕關閉時,我想從BroadCast Receiver中完成所有應用程序的活動:首先,我在“活動”中創建了一個靜態引用,如下所示:
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
public static AppCompatActivity ma;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//set instance of ma equals to MainActivity
ma=this;
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void displayView(int viewId) {
Fragment fragment = null;
String title = getString(R.string.app_name);
switch (viewId) {
case R.id.monthly_figures:
fragment = new dailysales();
title = "Daily Figures";
break;
case R.id.nav_gallery:
fragment=new monthlysales();
title="Monthly Figures";
break;
}
if (fragment != null) {
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.content_frame, fragment);
ft.commit();
}
// set the toolbar title
if (getSupportActionBar() != null) {
getSupportActionBar().setTitle(title);
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
}
那么Call來自我的BroadCastreceiver類,如下所示:
public class SCBroadcaster extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
if(intent.getAction().equals(Intent.ACTION_SCREEN_OFF)){
MainActivity.ma.finish();
}
}
}
您是否認為還有另一種更好的方法? 我試圖調用System.Exit(0)或process.killprocess(myPid),但是當重新打開屏幕時,它將重新啟動整個應用程序。 謝謝。
Android的設置不是很好。 該框架的想法是該應用程序永遠都不應關閉,並且始終可以在同一位置重新打開。 我認為這是一個壞主意(出於安全原因,某些應用程序需要在超時后關閉),但這就是它的工作原理。
盡管我討厭他們,但我認為活動巴士是前往這里的正確方法。 讓每個活動都在onCreate中注冊事件總線事件。 讓接收方在檢測到屏幕關閉(或您想要的任何其他觸發器)時發送事件。 當Activity收到該事件時,請調用finish()。 為了使事情變得簡單,請將此行為編碼到基本活動類中,並使所有活動都從該類派生,而不是直接從活動派生。
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