android - 如何从代码中获取对 元素的引用？

Question

如何获取对 <include> 的引用元素(我能否通过 ID 获取对布局中通过 <include> 标记添加的元素的引用)？

Answer 1

使用findViewById获取引用

看下面的例子

RelativeLayoutTesting.java

import android.app.Activity;
import android.os.Bundle;
import android.widget.EditText;

public class RelativeLayoutTesting extends Activity {

    android.widget.RelativeLayout currentView = null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate( savedInstanceState );

        // set the relative layout as our view 
        setContentView(R.layout.main1);
        EditText et = (EditText) findViewById(R.id.myEditText);
        et.setText("My Edit");
    }
}

ma​​in1.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" 
    android:background="#ffffff">

    <ImageButton
        android:id="@+id/alpha"
        android:layout_width="fill_parent"
        android:layout_height="50dip"
        android:background="#ff0000" />
    <include
        layout="@layout/edittext_layoout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</LinearLayout>

edittext_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<EditText xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/myEditText"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" >

</EditText>