1. View的属性分两类，

(1)第 一是View本身的属性：前缀没有"layout_"

(2)第二是View因为容器而具有的属性：前缀有"layout_"

2.布局文件中使用属性示例

3. Java代码中属性示例(包括操作UI本身属性与来自于布局UI的属性)

下面的代码全部是使用java代码来做的界面，但是可以达到与上面使用布局文件同样的效果(在eclips自还模式器中测试成功)

public class MainActivity extends Activity {

public View getView() {

LinearLayout out1 = new LinearLayout(this);

LinearLayout out2 = new LinearLayout(this);

ImageView imageView = new ImageView(this);

EditText editText = new EditText(this);

Button button = new Button(this);

out1.addView(out2);

out1.addView(button);

out2.addView(imageView);

out2.addView(editText);

LinearLayout.LayoutParams p1

= new LinearLayout.LayoutParams(0, 0);

p1.width = p1.MATCH_PARENT;

p1.height = p1.MATCH_PARENT;

p1.weight = 1;

out1.setLayoutParams(p1);

out1.setOrientation(LinearLayout.VERTICAL);

LinearLayout.LayoutParams p2 = new LinearLayout.LayoutParams(0,0);

p2.width = p2.MATCH_PARENT;

p2.height = p2.MATCH_PARENT;

p2.weight = 1;

out2.setLayoutParams(p2);

out2.setOrientation(LinearLayout.HORIZONTAL);

LinearLayout.LayoutParams p3 = new LinearLayout.LayoutParams(0,0);

p3.width = p3.MATCH_PARENT;

p3.height = p3.MATCH_PARENT;

p3.weight = 1;

button.setLayoutParams(p3);

button.setText("确定");

LinearLayout.LayoutParams p4 = new LinearLayout.LayoutParams(0,0);

p4.width = 100;

p4.height = p4.MATCH_PARENT;

p4.gravity = Gravity.LEFT|Gravity.CENTER_VERTICAL;

imageView.setLayoutParams(p4);

imageView.setScaleType(ScaleType.FIT_XY);

imageView.setImageResource(R.drawable.ic_launcher);

LinearLayout.LayoutParams p5 = new LinearLayout.LayoutParams(0,0);

p5.width = p5.MATCH_PARENT;

p5.height = p5.MATCH_PARENT;

p5.gravity = Gravity.RIGHT;

editText.setLayoutParams(p5);

editText.setBackgroundColor(0xff00ff00);

editText.setText("请输入名字");

editText.setTextSize(50.0f);

return out1;

}

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(this.getView());

}

}