编辑框Editext光标最后显示

【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>