安卓开发广播最简单强制下线

最新推荐文章于 2024-08-25 14:26:55 发布

原创最新推荐文章于 2024-08-25 14:26:55 发布 · 382 阅读

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简单代码广播专栏收录该内容

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本文介绍了一个简单的安卓应用程序如何通过发送广播来实现强制下线功能，并展示了如何使用广播接收器显示警告对话框提示用户重新登录的过程。

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部分代码

package com.example.test619qiangzhixiaxian.test619qiangzhixiaxian;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
    //发送广播
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button force_offline = (Button) findViewById(R.id.force_offline);
        force_offline.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent("com.example.broadcastbestpractice.FORCE_OFFLINE");
                sendBroadcast(intent);
                Intent intent1 = new Intent(MainActivity.this, LoginActivity.class);
                startActivity(intent1);
            }
        });
    }
}

package com.example.test619qiangzhixiaxian.test619qiangzhixiaxian;

import android.app.AlertDialog;
import android.content.BroadcastReceiver;
import android.content.ContentProviderOperation;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.view.WindowManager;

/**
 * Created by Administrator on 2017-06-19.
 */
//广播接收器
public class BroadcaseReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(final Context context, Intent intent) {
        AlertDialog.Builder dialogbuilder = new AlertDialog.Builder(context);
        dialogbuilder.setTitle("warning");
        dialogbuilder.setMessage("您已经强制退出，请重新登录");
        dialogbuilder.setCancelable(false);
        dialogbuilder.setPositiveButton("ok", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                //销毁所有东西
                ActivityCollector.finishAll();
                Intent intent1 = new Intent(context, LoginActivity.class);
                //根据活动启动方式，调用实现不同的穹顶方式
                intent1.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            }
        });
        //创建实现
        AlertDialog alertDialog = dialogbuilder.create();
        //需要设置ALTERDIALOG的类型，保证在广播接收器中正常弹出
        alertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
        alertDialog.show();

    }
}

package com.example.test619qiangzhixiaxian.test619qiangzhixiaxian;

import android.app.Activity;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by Administrator on 2017-06-19.
 */
// TODO: 2017-06-19 用于管理所有的活动 
public class ActivityCollector {
    //设置activity
    public static List<Activity> activities = new ArrayList<Activity>();

    //替换的方法
    public static void addActivity(Activity activity) {
        activities.add(activity);
    }

    //设置移除的方法
    public static void removeActivity(Activity activity) {
        activities.remove(activity);
    }

    //关闭所有现有活动
    public static void finishAll() {
        for (Activity activity : activities) {
            if (activity.isFinishing()) {
                activity.finish();
            }
        }
    }
}

package com.example.test619qiangzhixiaxian.test619qiangzhixiaxian;

import android.app.Activity;
import android.os.Bundle;

/**
 * Created by Administrator on 2017-06-19.
 */
// TODO: 2017-06-19 所有活动的父类
public class BaseActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActivityCollector.addActivity(this);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        ActivityCollector.removeActivity(this);
    }
}
package com.example.test619qiangzhixiaxian.test619qiangzhixiaxian;

import android.content.Intent;
import android.net.ConnectivityManager;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

/**
 * Created by Administrator on 2017-06-19.
 */

public class LoginActivity extends BaseActivity {
    EditText edit_account;
    EditText edit_password;
    Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);
        edit_account = (EditText) findViewById(R.id.account);
        edit_password = (EditText) findViewById(R.id.password);
        button = (Button) findViewById(R.id.login);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String account = edit_account.getText().toString();
                String pasworrd = edit_password.getText().toString();
                //设置账号是admin和密码是123456即为登录成功
                if (account.equals("admin") && pasworrd.equals("123456")) {
                    Intent intent = new Intent(LoginActivity.this, MainActivity.class);
                    startActivity(intent);
                    finish();
                } else {
                    Toast.makeText(LoginActivity.this, "您输入的不对，请重新输入", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
}
 demo地址：http://pan.baidu.com/s/1hsgOy4c