在android中单击按钮后传递第二个数据

我实际上采取了这个代码形式

我想在单击第二个活动中的按钮时将数据从第二个活动传递到第一个活动。为了确保传递的值是正确的，我希望它在返回到第一个活动时显示为toast

这是我在firstactivity_布局上的代码。res/activity\u intentintent.xml

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/TextView01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:minHeight="60dip"
        android:text="First Activity. Press button to call second activity"
        android:textSize="20sp" >
    </TextView>

    <Button
        android:id="@+id/Button01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="onClick"
        android:text="Calling an intent" >
    </Button>

</LinearLayout> 

最后一个是第二个活动，PickActivity.java

public class IntentintentActivity extends Activity {
    Button btn1;
    private static final int REQUEST_CODE = 10;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_intentintent);

    }

    public void onClick(View view) {
        Intent i = new Intent(this, PickActivity.class);
        i.putExtra("Value1", "This value one for ActivityTwo ");
        i.putExtra("Value2", "This value two ActivityTwo");
        // Set the request code to any code you like, you can identify the
        // callback via this code
        startActivityForResult(i, REQUEST_CODE);
      }

      @Override
      protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == RESULT_OK && requestCode == REQUEST_CODE) {
          if (data.hasExtra("returnKey1")) {
            Toast.makeText(this, data.getExtras().getString("returnKey1"),
                Toast.LENGTH_SHORT).show();
          }
        }
      }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_intentintent, menu);
        return true;
    }

public class PickActivity extends Activity{ 
Button submit;
EditText text1, text2;

public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
        setContentView(R.layout.picklayout);

        Bundle extras = getIntent().getExtras();
        if (extras == null) {
          return;
        }
        String value1 = extras.getString("Value1");
        String value2 = extras.getString("Value2");
        if (value1 != null && value2 != null) {
          text1 = (EditText) findViewById(R.id.input11);
          text2 = (EditText) findViewById(R.id.input22);
          text1.setText(value1);
          text2.setText(value2);            

        }   
        submit = (Button)findViewById(R.id.button1);
        /*
        submit.setOnClickListener(new OnClickListener(){
            public void onClick(View v){
                Toast.makeText(this, text1.getText(), 2500).show();
            }
        });
        */
    }

public void onClick(View v) {
    Toast.makeText(this, text1.getText(), 2500).show();
    finish();
  }     

      @Override
      public void finish() {
        Intent data = new Intent(this, IntentintentActivity.class);
        Toast.makeText(this, "finish state", 2500).show();
        // Return some hard-coded values
        data.putExtra("returnKey1", "Swinging on a star. ");
        data.putExtra("returnKey2", "You could be better then you are. ");
        setResult(RESULT_OK, data);
        int result = 1;
        //startActivityForResult(data, result);
        super.finish();
      }

}

我试图在第二个活动中设置按钮的侦听器，如下所示

public class PickActivity extends Activity{ 
Button submit;
EditText text1, text2;

public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
        setContentView(R.layout.picklayout);

        Bundle extras = getIntent().getExtras();
        if (extras == null) {
          return;
        }
        String value1 = extras.getString("Value1");
        String value2 = extras.getString("Value2");
        if (value1 != null && value2 != null) {
          text1 = (EditText) findViewById(R.id.input11);
          text2 = (EditText) findViewById(R.id.input22);
          text1.setText(value1);
          text2.setText(value2);            

        }   
        submit = (Button)findViewById(R.id.button1);

        submit.setOnClickListener(new OnClickListener(){
            public void onClick(View v){
                Toast.makeText(this, text1.getText(), 2500).show();
            }
        });

    }

但是它说，

Toast.makeText（…）

不适用于参数（newview.onClickListener）

---

有人知道怎么解决这个问题吗。谢谢。

在Toast中，您必须用getBaseContext（）替换'this'参数。

您在一个内部类中，这应该是intentintentivity.this

     Toast.makeText(IntentintentActivity.this, data.getExtras().getString("returnKey1"),
        Toast.LENGTH_SHORT).show();

看，这就是问题所在

     Toast.makeText(IntentintentActivity.this, data.getExtras().getString("returnKey1"),
        Toast.LENGTH_SHORT).show();