类ActivityCollector
package com.example.broadcastbestpractice;
import android.app.Activity;
import java.util.ArrayList;
import java.util.List;
/**
* Created by 123 on 2018/10/18.
*/
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();
}
}
}
}
类BaseAvtivity
package com.example.broadcastbestpractice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
/**
* Created by 123 on 2018/10/18.
*/
public class BaseActivity extends AppCompatActivity{
private ForceOfflineReceiver receiver;
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
ActivityCollector.addActivity(this);
}
@Override
protected void onResume(){
super.onResume();
IntentFilter intentFilter=new IntentFilter();
intentFilter.addAction("com.example.broadcastbestpractice.FORCE_OFFLINE");
receiver =new ForceOfflineReceiver();
registerReceiver(receiver,intentFilter);
}
protected void onPause(){
super.onPause();
if(receiver!=null){
unregisterReceiver(receiver);
receiver=null;
}
}
protected void onDestroy(){
super.onDestroy();
ActivityCollector.removeActivity(this);
}
class ForceOfflineReceiver extends BroadcastReceiver{
public void onReceive(final Context context, final Intent intent)
{
AlertDialog.Builder builder=new AlertDialog.Builder(context);
builder.setTitle("Warning");
builder.setMessage("login again");
builder.setCancelable(false);
builder.setPositiveButton("OK",new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog,int which)
{
ActivityCollector.finishAll();
Intent intent1= new Intent(context,LoginActivity.class);
context.startActivity(intent);
}
});
builder.show();
}
}
}
类LoginActivity
package com.example.broadcastbestpractice; import android.content.Intent; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class LoginActivity extends BaseActivity{ private EditText accountEdit; private EditText passwordEdit; private Button login; protected void onCreate(Bundle saveInstanceState) { super.onCreate(saveInstanceState); setContentView(R.layout.activity_login); 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 v) { String account =accountEdit.getText().toString(); String password=passwordEdit.getText().toString(); if (account.equals("admin")&&password.equals("123456")) { Intent intent =new Intent(LoginActivity.this,MainActivity.class); startActivity(intent); finish(); } else { Toast.makeText(LoginActivity.this,"account or password is invalid",Toast.LENGTH_SHORT).show(); } } }); } }
类MainACtivity
package com.example.broadcastbestpractice; import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import java.sql.BatchUpdateException; public class MainActivity extends BaseActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button forceoffline=(Button)findViewById(R.id.force_offline); forceoffline.setOnClickListener(new View.OnClickListener(){ public void onClick(View v){ Intent intent=new Intent("com.example.broadcastbestpractice.FORCE_OFFLINE"); sendBroadcast(intent); } }); } }
activity_login.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <!-- Login progress --> <LinearLayout android:layout_width="match_parent" android:layout_height="60dp" android:orientation="horizontal"> <TextView android:layout_width="90dp" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:textSize="18sp" android:text="Account:" /> <EditText android:layout_width="0dp" android:layout_height="wrap_content" android:id="@+id/account" android:layout_weight="1" android:layout_gravity="center_vertical"/> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="60dp" android:orientation="horizontal" > <TextView android:layout_width="90dp" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:textSize="18sp" android:text="Password" /> <EditText android:layout_width="0dp" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:layout_weight="1" android:id="@+id/password" android:inputType="textPassword"/> </LinearLayout> <Button android:layout_width="match_parent" android:layout_height="60dp" android:id="@+id/login" android:text="Login"/> </LinearLayout>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.broadcastbestpractice.MainActivity"> <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Send force offline broadcast" android:id="@+id/force_offline"/> </RelativeLayout>
Androidmanifest.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.broadcastbestpractice.MainActivity"> <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Send force offline broadcast" android:id="@+id/force_offline"/> </RelativeLayout>