在活动之间切换活动/传递数据

因此，使用了我询问的最后一个问题的建议，我想出了如何调用BarCodeScanner并将该值返回给字段。所以现在，我有一个吐司说“成功的扫描”，然后我想把结果传递给一个新的活动。当我注释掉我的意图时，一切正常（减去数据/屏幕切换的传递，显然），但是当我按原样运行我的项目时，它的FC ...没有eclipse在代码或XML中报告的错误。任何见解？在活动之间切换活动/传递数据

package com.mhe.test.scan; 

import android.app.Activity; 
import android.content.Context; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.Toast; 


public class main extends Activity { 
/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.main); 
    Button myScanButton = (Button) findViewById(R.id.myScanButton); 
    totalbox = (EditText) findViewById(R.id.tBox);   

    myScanButton.setOnClickListener(new Button.OnClickListener() { 
     public void onClick(View v) { 
     Intent intent = new Intent("com.google.zxing.client.android.SCAN"); 
     intent.putExtra("SCAN_MODE", "PRODUCT_MODE"); 
     startActivityForResult(intent, 0); 
     } 
    }); 
    } 
    private EditText totalbox; 
    public void onActivityResult(int requestCode, int resultCode, Intent intent) { 
    if (requestCode == 0) { 
     if (resultCode == RESULT_OK) { 
     final String contents = intent.getStringExtra("SCAN_RESULT"); 

     if (totalbox != null) 
     totalbox.setText(contents); 


     Context context = getApplicationContext(); 
     CharSequence text = "Successful Scan"; 
     int duration = Toast.LENGTH_SHORT; 
     Toast toast = Toast.makeText(context, text, duration); 
     toast.show(); 


    Intent i = new Intent(main.this, Result.class); 
     i.putExtra("SNARP", "SCAN_RESULT"); 
     startActivityForResult(i, 0); 

     } else if (resultCode == RESULT_CANCELED) { 

     if (totalbox != null) 
      totalbox.setText("bummer"); 
     } 
    }  
    } 

}

然后处理传递的数据，在新的活动：

package com.mhe.test.scan; 

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

public class Result extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.result); 

    Intent i = getIntent(); 
    Bundle b = i.getExtras(); 
    String foosh = b.getString("SNARP"); 

    EditText box1 = (EditText) findViewById(R.id.tBox1);  
     box1.setText(foosh);

来源

2010-06-30 sgardeski

尝试调用新的意图时，发送Bundle对象。

Intent i = new Intent(main.this, Result.class); 
Bundle b = new Bundle(); 
b.putString("SNARP", "SCAN_RESULT") 
i.putExtras(b);

来源

2010-06-30 22:55:07 amarsuperstar

尝试以这种方式在子Activity中获取字符串。

public class Result extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.result); 

    Intent i = getIntent(); 
    String foosh = i.getStringExtra("SNARP");

来源

2010-07-01 01:20:13 primpap

在活动之间切换活动/传递数据

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