Question

我是新的android developer.three java文件和xml文件。在我的项目中，当列表视图上显示所有收件箱消息时，但是当我选择此消息时，不显示在另一个活动的编辑框上。下面的代码当我选择页面导航到messagebox.java到mainactivity.java但msg不显示在编辑框上

  three java files--
**Mainactivity.java**
Intent intent = getIntent();
    String msg = intent.getStringExtra("Msg_Detail");
    TextView7 = (TextView) findViewById(R.id.TextView7);
    TextView7.setText(msg);
**MessageBox.java**
lvMsg = (ListView) findViewById(R.id.lvMsg);
        Uri inboxURI = Uri.parse("content://sms/inbox");

        // List required columns
        String[] reqCols = new String[] { "_id", "address", "body" };

        // Get Content Resolver object, which will deal with Content
        // Provider
        ContentResolver cr = getContentResolver();

        // Fetch Inbox SMS Message from Built-in Content Provider
        Cursor c = cr.query(inboxURI, reqCols, null, null, null);

        // Attached Cursor with adapter and display in listview
        adapter = new SimpleCursorAdapter(this, R.layout.row, c,
                new String[] { "body", "address" }, new int[] {
                        R.id.lblMsg, R.id.lblNumber });
        lvMsg.setAdapter(adapter);
        lvMsg.setOnItemClickListener(new OnItemClickListener() {

                    @Override
                    public void onItemClick(AdapterView<?> parent, View view,
                       int position, long id) {
                      String msg=(String) lvMsg.getSelectedItem();
                    Intent in = new Intent(getApplicationContext(),MainActivity.class);
                                        in.putExtra("Msg_Detail", msg); 
                                        startActivity(in);

                 }
             }); 

    }
**list.java**
@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.row);

        txt = (TextView) findViewById(R.id.lblMsg);
        txt2= (TextView) findViewById(R.id.lblNumber);

}

activity_xml messagebox.xml -all listview（listview上的消息显示）

    </ListView>
**list.xml**--all message display in textview(lblmsg and lblno)
<TextView android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="TextView" android:layout_width="wrap_content"
        android:layout_height="wrap_content" android:id="@+id/lblMsg"></TextView>
    <TextView android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="TextView" android:layout_width="wrap_content"
        android:layout_height="wrap_content" android:textColor="#00f"
        android:id="@+id/lblNumber"></TextView>

activity_xml-包含textview和messagebox.xml-listview以及list.xml-contains textview 在listactivity.java

的editbox上的listview显示中选择textview msg

Answer 1

试试这个：

 String msg = intent.getExtras().getString("Msg_Detail");

选择listview项目显示在textview的另一个活动上

1 个答案: