Question

我正在尝试将一些字符串数据从子活动发送到主要活动，并在编辑文本字段中显示该数据。这是我在子活动中的代码：

button.setOnClickListener(new OnClickListener() {
    public void onClick(View v) {
        Intent in = new Intent();
        in.setClass(getApplicationContext(),
        DelaySmsActivity.class);
        in.putExtra("values", stringDataForSend);
        setResult(RESULT_OK, in);                   
        finish();
    }
});

这里是主要活动的代码，我试图获得该值：

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data);
    parametar = data.getStringExtra("values");
    editTextField.setText(parametar);
}

运行后，我的editTextField为空。

Answer 1

为了传递简单的数据，比如字符串，我改用Bundles。

在你的onClick：

Intent yourIntent = new Intent(currentActivity.this, NextActivity.class);
Bundle yourBundle = new Bundle();
yourBundle.putString("name", string);
yourIntent.putExtra(yourBundle);
startActivity(yourIntent);

然后，在您的下一个活动的onCreate中，检索您的字符串，如：

Bundle bundle = getIntent().getExtras();
String passedValue = bundle.getString("name");

Answer 2

试试这个让我们说你现在的活动是X而下一个活动是Y： -

   Intent main= new Intent(X.this, Y.class);
   main.putExtra("key", "somevalue");
   X.this.startActivity(main);

在Y Activity onCreate

   Intent intent = getIntent();
   String value= intent.getStringExtra("key");

Answer 3

因为您不在此处提交代码，这是一个可以帮助您的示例

当您致电活动时，请使用startActivityForResult() not startActivity()

public class CheckStartActivityForResult extends Activity {
     int requestCode;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        Log.d("CheckStartActivity","OnCreate");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Intent i = new Intent(this,CalledActivity.class);       
        startActivityForResult(i, requestCode);
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        Log.d("CheckStartActivity","onActivityResult and resultCode = "+resultCode);
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode==1){
            Toast.makeText(this, "Pass", Toast.LENGTH_LONG).show();
        }
        else{
            Toast.makeText(this, "Fail", Toast.LENGTH_LONG).show();
        }
    }
}

和被叫活动

public class CalledActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.d("CalledActivity","OnCreate ");
        //String value = "rahul";
        Intent in = new Intent();
        setResult(1,in);//Here I am Setting the Requestcode 1, you can put according to your requirement
        finish();
    }

}

将数据从一个活动发送到另一个活

3 个答案: