Question

基本上，我试图通过EditText＆＃34;确定＆＃34;我的button显示在TextView输出中显示的内容。一旦＆＃34; Ok＆＃34;按下button，它会获取EditText中输入的内容，并显示在TextView中。

一直在寻找并找不到有效的方法。有人可以帮忙吗？

编辑： 1）真的很感激回应和帮助家伙。 2）我想我错了。我尝试做的是创建一个选项，用户可以将自己的文本添加到活动中。

编辑：谢谢你的帮助!!!!!!!!!!!!

Answer 1

从EditText

获取价值

editText.getText().toString();

在TextView

中将值设置为Button Click

textView.setText(editText.getText().toString());

更新

实施Button Onclick(...)之类的

 Button negativeButton = (Button) findViewById(R.id.ButtonID);

 negativeButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
             textView.setText(editText.getText().toString());
        }
    });

Answer 2

在Activity

中的OnCreate()中使用

    Button _ok =      (Button) findViewById(R.id.idofButton);
   TextView result = (TextView ) findViewById(R.id.idofTextView);
    EditText entrytext = (EditText ) findViewById(R.id.idofEditText);

   _ok.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
         result .setText(entrytext .getText().toString());
    }
});

Answer 3

假设EditText命名为et，TextView命名为tv，而Button命名为bt .. 现在在你的类名下面声明你的EditText，TextView和Button，如下所示：

public class EditToText extends Activity{
EditText et;
TextView tv;
Button bt;
------
------
 }

现在使用onCreate方法，setContentView之后执行以下操作：

------
------
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    et = (EditText) findViewById(R.id.edittext); //EditText is defined as edittext in xml
    tv = (TextView) findViewById(R.id.textview); //TextView is defined as textview in xml
    bt = (Button) findViewById(R.id.button); //Button is defined as button in xml

    //When button is clicked
    bt.setOnClickListener(new View.OnClickListener(){   
    @Override 
        public void onClick(View v) {
            String txt = et.getText().toString(); //Get txt from et when button is clicked
            tv.setText(txt); //Set text extracted from et in tv

        } 
    }); 
}
------
------

希望这有帮助！

Answer 4

activity_mail.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.stackedittext.MainActivity" >

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="21dp"
        android:ems="10"
        android:hint="ENTER TEXT HERE" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText1"
        android:layout_below="@+id/editText1"
        android:layout_marginTop="62dp"
        android:text="Medium Text"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/textView1"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="42dp"
        android:text="OK" />

</RelativeLayout>

MainActivity.java

package com.example.stackedittext;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

    Button ok;
    EditText edt;
    TextView tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ok = (Button) findViewById(R.id.button1);
        edt = (EditText) findViewById(R.id.editText1);
        tv = (TextView) findViewById(R.id.textView1);

        ok.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                String msg = edt.getText().toString();
                tv.setText(msg);

                // TODO Auto-generated method stub

            }
        });
    }

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

如何在TextView中显示EditText？

4 个答案:

更新