Activity篇之Activity之间通信

最新推荐文章于 2022-10-18 21:57:45 发布

原创最新推荐文章于 2022-10-18 21:57:45 发布 · 1.6k 阅读

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#Activity通信

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本文探讨了Android中Activity之间通信的三种常见方法：Intent、BroadcastReceiver和使用startActivityForResult配合setResult。详细阐述了Intent的传统请求方式，特别是与启动模式的结合使用，以及startActivityForResult与setResult的代码示例。同时，还简要介绍了BroadcastReceiver的通信模式，并提供了相关Demo。

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Activity之间的通信方式,暂时我能想到的有3种分别是：1.Intent方式,2.BroadcastReciver方式下面就用来代码来描述下

Intent方式一般分为2种：1.传统Intent请求方式2.通过startActivityForResult()+setResult()方式

针对传统的Intent请求方式,这里需要结合启动模式表现更佳.

第一种方式代码如下：

package intent1.activity;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import cn.activitycommunication.com.R;

/**
 * Created by Administrator on 2016/11/26 0026.
 */
public class Activity1 extends Activity
{
    private TextView tetxtview;
    private Button btn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity1);
        tetxtview=(TextView) findViewById(R.id.tetxtview);
        btn=(Button) findViewById(R.id.btn);
        btn.setText("跳转到Activity2");
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent(Activity1.this,Activity2.class);
                intent.putExtra("data","123");
                startActivity(intent);
            }
        });
    }
    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        tetxtview.setText("收到信息：【"+intent.getStringExtra("data")+"】");
    }
}

package intent1.activity;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import cn.activitycommunication.com.R;

/**
 * Created by Administrator on 2016/11/26 0026.
 */
public class Activity2 extends Activity
{
    private TextView tetxtview;
    private Button btn;
    private String data;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity1);
        data=getIntent().getStringExtra("data");
        tetxtview=(TextView) findViewById(R.id.tetxtview);
        tetxtview.setText("收到信息：【"+data+"】");
        btn=(Button) findViewById(R.id.btn);
        btn.setText("回到到Activity1");
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent(Activity2.this,Activity1.class);
                intent.putExtra("data","456");
                startActivity(intent);
            }
        });
    }
}

运行截图：

startActivityForResult+setResult方式：

package intent2.activity;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import cn.activitycommunication.com.R;

/**
 * Created by Administrator on 2016/11/26 0026.
 */
public class Activity1 extends Activity
{
    private TextView tetxtview;
    private Button btn;
    private final int REQUESTCODE=1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity1);
        tetxtview=(TextView) findViewById(R.id.tetxtview);
        btn=(Button) findViewById(R.id.btn);
        btn.setText("跳转到Activity2");
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Activity1.this, Activity2.class);
                intent.putExtra("data", "123");
                startActivityForResult(intent, REQUESTCODE);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        super.onActivityResult(requestCode, resultCode, intent);
        if(resultCode==RESULT_OK)
        {
            if(requestCode==REQUESTCODE)
            {
                tetxtview.setText("收到信息：【"+intent.getStringExtra("data")+"】");
            }
        }
    }

}

package intent2.activity;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import cn.activitycommunication.com.R;

/**
 * Created by Administrator on 2016/11/26 0026.
 */
public class Activity2 extends Activity
{
    private TextView tetxtview;
    private Button btn;
    private String data;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity1);
        data=getIntent().getStringExtra("data");
        tetxtview=(TextView) findViewById(R.id.tetxtview);
        tetxtview.setText("收到信息：【"+data+"】");
        btn=(Button) findViewById(R.id.btn);
        btn.setText("回到到Activity1");
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=getIntent();
                intent.putExtra("data","456");
                setResult(RESULT_OK, intent);
                finish();
            }
        });
    }
}

运行截图：

3.广播方式

package broadcast.activity;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import cn.activitycommunication.com.R;

/**
 * Created by Administrator on 2016/11/26 0026.
 */
public class Activity1 extends Activity
{
    private TextView tetxtview;
    private Button btn;
    private MyBroadCastReciver reciver;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity1);
        reciver=new MyBroadCastReciver();
        IntentFilter intentFilter=new IntentFilter();
        intentFilter.addAction("com.action.broadcast");
        registerReceiver(reciver, intentFilter);
        tetxtview=(TextView) findViewById(R.id.tetxtview);
        btn=(Button) findViewById(R.id.btn);
        btn.setText("跳转到Activity2");
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Activity1.this, Activity2.class);
                intent.putExtra("data", "123");
                startActivity(intent);
            }
        });
    }
    class MyBroadCastReciver extends BroadcastReceiver
    {
        @Override
        public void onReceive(Context context, Intent intent) {
            tetxtview.setText("收到信息：【"+intent.getStringExtra("data")+"】");
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(reciver);
    }
}

package broadcast.activity;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import cn.activitycommunication.com.R;

/**
 * Created by Administrator on 2016/11/26 0026.
 */
public class Activity2 extends Activity
{
    private TextView tetxtview;
    private Button btn;
    private String data;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity1);
        data=getIntent().getStringExtra("data");
        tetxtview=(TextView) findViewById(R.id.tetxtview);
        tetxtview.setText("收到信息：【"+data+"】");
        btn=(Button) findViewById(R.id.btn);
        btn.setText("回到到Activity1");
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent("com.action.broadcast");
                intent.putExtra("data","456");
                sendBroadcast(intent);
                finish();
            }
        });
    }
}

运行截图：

下面附上Demo