Android使用绝对布局AbsoluteLayout动态添加控件

• layout.xml

<AbsoluteLayout  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:id="@+id/absolute_layout"
    >
    
</AbsoluteLayout>

• Activity

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.eframe);
        
        absLayout = (AbsoluteLayout)findViewById(R.id.absolute_layout);
        absLayout.setBackgroundColor(Color.RED);
    }

• 新建控件

        tv = new TextView(this.getApplicationContext());
        tv.setBackgroundColor(Color.BLUE);
        tv.setText("泰山Office");

• 添加控件

        AbsoluteLayout.LayoutParams params = new AbsoluteLayout.LayoutParams(width, height, x, y);
        absLayout.addView(v, params);

需要强调的是，如果之前给控件设置宽高，添加时获取，是错误的。以下代码无效：

v.setWidth( 300);
v.setHeight(100);

# 无法显示出来。因为得到的宽高是0。
AbsoluteLayout.LayoutParams params = new AbsoluteLayout.LayoutParams(v.getWidth(), v.getHeight(), x, y);
 absLayout.addView(v, params);