android活动的设计

你要找的是 startActivityForResult

从屏幕返回结果

窗口关闭后可以返回结果。此结果将传回调用活动的onActivityResult()方法,该方法可以提供包含任意数据的意图,以及传递给startActivityForResult()的请求代码。请注意,必须调用接受请求代码参数的startActivityForResult()方法才能获取此回调。下面的代码演示如何打开新屏幕并检索结果。

// Open the new screen.
public void onClick(View v){
    // Start the activity whose result we want to retrieve.  The
    // result will come back with request code GET_CODE.
    Intent intent = new Intent(this, com.example.app.ChooseYourBoxer.class);
    startActivityForResult(intent, CHOOSE_FIGHTER);
}

// Listen for results.
protected void onActivityResult(int requestCode, int resultCode, Intent data){
    // See which child activity is calling us back.
    switch (resultCode) {
        case CHOOSE_FIGHTER:
            // This is the standard resultCode that is sent back if the
            // activity crashed or didn't doesn't supply an explicit result.
            if (resultCode == RESULT_CANCELED){
                myMessageboxFunction("Fight cancelled");
            } 
            else {
                myFightFunction(data);
            }
        default:
            break;
    }
}



// Class SentResult
// Temporary screen to let the user choose something.
    private OnClickListener mLincolnListener = new OnClickListener(){
        public void onClick(View v) {
            Bundle stats = new Bundle();
            stats.putString("height","6\'4\""); 
            stats.putString("weight", "190 lbs");
            stats.putString("reach", "74\"");
            setResult(RESULT_OK, "Lincoln", stats);
            finish();
        }
    };

    private OnClickListener mWashingtonListener = new OnClickListener() {
        public void onClick(View v){
            Bundle stats = new Bundle();
            stats.putString("height","6\'2\""); 
            stats.putString("weight", "190 lbs");
            stats.putString("reach", "73\"");
            setResult(RESULT_OK, "Washington", Bundle);
            finish();
        }
    };