【MainActivity】

package com.example.testeditext;

import android.os.Bundle;

import android.app.Activity;

import android.widget.EditText;

import android.widget.TextView;

public class MainActivity extends Activity {

	private TextView t ;

	private EditText e;

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		t = (TextView) findViewById(R.id.textView1);

		e = (EditText) findViewById(R.id.editText1);

		e.setText(t.getText().toString());

		//光标跟着字动，一直居后面

		e.setSelection(t.getText().toString().length());

	}

}

【activity_main.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=".MainActivity" >

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/hello_world" />

    <EditText

        android:id="@+id/editText1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/textView1"

        android:layout_below="@+id/textView1"

        android:ems="10" >

        <requestFocus />

    </EditText>

</RelativeLayout>