Android中onActivityResult不触发

2022-02-24 05:06:37

折腾了一天,百度了各种方法都不奏效.怎么办呢

新建了个测试项目,在里边儿丢进去如下代码

这是窗体1

package com.example.activityonresult;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity implements OnClickListener{
    Button btn;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn=(Button)findViewById(R.id.button1);
        btn.setOnClickListener(this);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

    public void onClick(View v) {
        // TODO Auto-generated method stub
        if(v==btn)
        {
            Log.d("主窗体按钮","按下触发");
            Intent intt=new Intent(MainActivity.this,Activity02.class);
            intt.putExtra("info1", "Ifff");
            startActivityForResult(intt,1);
            
        }
    }
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        Log.d("GetResult02", data.getStringExtra("info2"));
        Integer ss=data.getIntExtra("info3", 444);
        String sdf=ss.toString();
        Log.d("GetResult02",sdf);
        Boolean sa= data.getBooleanExtra("info4", false);
        Log.d("GetResult02", sa.toString());
        btn.setText(data.getStringExtra("info2"));
    }
}

View Code

这是窗体2

package com.example.activityonresult;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class Activity02 extends Activity implements OnClickListener{
    Button btn;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity2);
        btn=(Button)findViewById(R.id.button1);
        btn.setOnClickListener(this);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

    public void onClick(View v) {
        // TODO Auto-generated method stub
        Intent intent =new Intent(Activity02.this,MainActivity.class);
        intent.putExtra("info2", "123");
        intent.putExtra("info3", 1244);
        intent.putExtra("info4", true);
        setResult(33,intent);
        finish();
    }
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        Log.d("触发result02","获取结果");
        Log.d("GetResultMain", data.getStringExtra("info1"));
        btn.setText(data.getStringExtra("info1"));
    }

}

View Code

试了试终于触发了...但是很遗憾只触发了窗体1的onActivityResult

半天想不明白怎么回事,于是回到之前的测试项目中检查了一下代码,修修改改一些不着边际的东西

于是我想既然穿不回来,把参数传给第二个窗体怎么样,于是我在菜单中添加了如下代码

    public boolean onMenuItemSelected(int featureId, MenuItem item) {
        Intent it=new Intent(TestProc.this,Cfg.class);
        it.putExtra("IPaddress", IPaddress);
        it.putExtra("Port", Port);
        it.putExtra("IsTcp", IsTcp);
        switch (item.getItemId()) {
        case 1:
            startActivityForResult(it,34);
            break;
        default:
            break;
        }
        // TODO Auto-generated method stub
        return super.onMenuItemSelected(featureId, item);
    }

嘿,成了,第二个窗体触发了onActivityResult,兴奋至极...于是翻开第二个窗体中的按钮事件

    public void onClick(View v) {
        // TODO Auto-generated method stub
        //Bundle bundle = new Bundle();
        //bundle.putInt("Port", resPort);
        //intent.putExtras(bundle);

        Intent intent = new Intent();
        string ipaddr=TxtipAddr.getText().toString();
        intent.putExtra("IP", ipaddr);
        int Port=Integer.parseInt(TxtPort.getText().toString());
        intent.putExtra("Port", Port);
        if(rbtntcp.isChecked()){
           Log.d("设置结果", "设置tcp");
        　 intent.putExtra("IsTcp", true);}
        else{
            Log.d("设置结果", "设置udp");
            intent.putExtra("IsTcp", false);}
        Cfg.this.setResult(1, intent);//返回参数  
        Log.d("设置结果", "设置结束");
        Cfg.this.finish();//关闭Activity  
    }

发现三处不同的地方

第一,没有为Intent设置class

第二,在声明Intent后执行了些其它代码

第三,用的变量类型不一样

于是改了改代码:

    public void onClick(View v) {
        // TODO Auto-generated method stub
        //Bundle bundle = new Bundle();
        //bundle.putInt("Port", resPort);
        //intent.putExtras(bundle);
        String ipaddr=TxtipAddr.getText().toString();
        Boolean IsTcp=rbtntcp.isChecked();
        Integer Port=Integer.parseInt(TxtPort.getText().toString());
        Intent intent = new Intent(Cfg.this,TestProc.class);
        intent.putExtra("IP", ipaddr);
        intent.putExtra("Port", Port);
        intent.putExtra("IsTcp", IsTcp);
        Cfg.this.setResult(642, intent);//返回参数  
        Log.d("设置结果", "设置结束");
        Cfg.this.finish();//关闭Activity  
    }

窗体一中的onActivityResult成功执行! 大功告成...

等等...窗体二中的onActivityResult又不执行了.....买了个表....

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Android中onActivityResult不触发

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