我实际上采用了vogella.com的代码。
单击第二个活动中的按钮时，我想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，我希望它在返回第一个活动时显示为敬酒。
这是我在 firstactivity_layout 上的代码。res/activity_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>
这是布局的第二个代码。水库/picklayout.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" >
<EditText
android:id="@+id/input11"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10" >
<requestFocus />
</EditText>
<EditText
android:id="@+id/input22"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10" />
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Button" />
</LinearLayout>
这是第一个布局的活动代码，IntentintentActivity.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;
}
最后是第二个活动，PickActivity.java
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();
}
}
我试图将按钮的侦听器放在第二个活动中，就像这样。
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（新 View.onClickListener）。
请问有谁知道如何解决这个问题。谢谢你。