学步园

问题：在某个主要Layout里面有个LinearLayout，用来动态加载别的view页面，如果需要加载的动态view内容很空洞(例如没有足够的Text长度来撑起整个layout宽度)，这时候这个被加载的view就会不能以fill_parent的width来显示。

如图：

实际想要的效果为：

java code：

public class TestActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        LinearLayout layout = (LinearLayout) findViewById(R.id.layout);
        View view = getLayoutInflater().inflate(R.layout.test, null);
        layout.addView(view);
    }
}

main 布局：

<?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:background="#fff"
    android:orientation="vertical" >

    <LinearLayout
        android:id="@+id/layout"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >
    </LinearLayout>

</LinearLayout>

test 布局：

<?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:background="#fff"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="测试页面" />

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_margin="5dip"
        android:orientation="horizontal" >

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="账号：" />

        <EditText
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_margin="5dip"
        android:orientation="horizontal" >

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="密码：" />

        <EditText
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" />
    </LinearLayout>

</LinearLayout>

解决办法：

在动态view的添加代码前定义一个LayoutParams，然后在添加view时明确定义一下这个view的LayoutParams

public class TestActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        LinearLayout layout = (LinearLayout) findViewById(R.id.layout);
        View view = getLayoutInflater().inflate(R.layout.test, null);
        LayoutParams params = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
        layout.addView(view, params);
    }
}