如何在Android上的活動之間發送意圖變量？

Question

我正在寫一個android apllication，我有兩個活動。我應該將requestCode，resultCode和Intent數據發送到其他活動中。我設法發送了前兩個成功，但我怎麼能發送「意圖數據」變量到其他活動？

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 
    try { 
     // When an Image is picked 
     if (requestCode == RESULT_LOAD_IMG && resultCode == RESULT_OK 
       && null != data) { 

Answer 1

調用次活動從FirstActivity：

Intent intent = new Intent(FirstActivity.this, SecondActivity.class); 
intent.putExtra("intent_data_tag","data"); 
startActivityforResult(intent,200); 

獲得第二個活動意圖數據：

String intentData = getIntent().getStringExtra("intent_data_tag","defValue"); 

發送結果FirstActivity：

Intent resultIntent = new Intent(); 
// TODO Add extras or a data URI to this intent as appropriate. 
resultIntent.putExtra("result_data_tag","result_data"); 
setResult(Activity.RESULT_OK, resultIntent); 
finish(); 

獲取引起FirstActivity ：

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
if (requestCode == 200 && resultCode == RESULT_OK && data != null) { 
    String resultData = data.getStringExtra("result_intent","defValue") 
} 
} 

例子：MainActivity.java

import android.os.Bundle; 
import android.app.Activity; 
import android.content.Intent; 
import android.view.Menu; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.TextView; 
public class MainActivity extends Activity { 
TextView textView1; 
Button button1; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    textView1=(TextView)findViewById(R.id.textView1); 
    button1=(Button)findViewById(R.id.button1); 
    button1.setOnClickListener(new OnClickListener() { 
     @Override 
     public void onClick(View arg0) { 
      Intent intent=new Intent(MainActivity.this,SecondActivity.class); 
      startActivityForResult(intent, 2);// Activity is started with requestCode 2 
     } 
    }); 
} 
// Call Back method to get the Message form other Activity 
@Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) 
    { 
      super.onActivityResult(requestCode, resultCode, data); 
       // check if the request code is same as what is passed here it is 2 
       if(requestCode==2) 
        { 
         String message=data.getStringExtra("MESSAGE"); 
         textView1.setText(message); 
        } 
} 
@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.main, menu); 
    return true; 
} 

}

SecondActivity.java

import android.os.Bundle; 
import android.app.Activity; 
import android.content.Intent; 
import android.view.Menu; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.TextView; 
public class SecondActivity extends Activity { 
EditText editText1; 
Button button1; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_second); 
    editText1=(EditText)findViewById(R.id.editText1); 
     button1=(Button)findViewById(R.id.button1); 
     button1.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View arg0) { 
       String message=editText1.getText().toString(); 
       Intent intent=new Intent(); 
       intent.putExtra("MESSAGE",message); 
       setResult(2,intent); 
       finish();//finishing activity 
      } 
     }); 
} 
@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.second, menu); 
    return true; 
} 
}