Android应用开发之编码实现 软件界面

删掉了main.xml文件

首先使用线性布局

LinearLayout linearLayout=new LinearLayout(this);

设置布局方向：

linearLayout.setOrientation(LinearLayout.VERTICAL);

布局的参数：填充整个窗口的宽和高

LinearLayout.LayoutParams layoutParams=new LinearLayout.LinearParams(
ViewGroup.LinearParams.HILL_PARENT,ViewGroup.LinearParams.FILL_PARENT
);

建立一个textview的布局参数：

ViewGroup.LayoutParams textViewParams=new ViewParams.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,ViewGroup.LayoutParams.WRAP_CONTENT)

建立一个textview

TextView textView=new TextView(this);
textView.setText(R.string.app_name);
textView.setId(20);

往容器里填加控件：

linearLayout.addView(text.View,textViewParams);
setContentView(linearLayout,layoutParams);

只有界面在运行期。随着运行期的某些条件而变化的

实验：

private static final int HELLO_TV_ID = 10;
private LayoutParams params;

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//        setContentView(R.layout.main);

LinearLayout linearLayout = new LinearLayout(this);
TextView textView = new TextView(this);
textView.setText(R.string.hello);
textView.setId(HELLO_TV_ID);

params = new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT);
linearLayout.addView(textView, params);

params = new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.FILL_PARENT);
this.setContentView(linearLayout,params);
}