Android 中的布局方式之線性布局

Android中我們知道，可以用main.xml等方式來布局一個activity的狀態，但是我們也可以用代碼的方式來進行布局，從而拋棄那種xml方式的布局，代碼如下：

1. package com.andy.android.layout;
3. import android.app.Activity;
4. import android.os.Bundle;
5. import android.view.ViewGroup;
6. import android.widget.Button;
7. import android.widget.LinearLayout;
8. import android.widget.TextView;
10. public class LayoutTestActivity extends Activity {
11. /** Called when the activity is first created. */
12. @Override
13. public void onCreate(Bundle savedInstanceState) {
14. super.onCreate(savedInstanceState);
15. LinearLayout layout = new LinearLayout(getApplicationContext());
16. LinearLayout.LayoutParams layoutParm = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,ViewGroup.LayoutParams.WRAP_CONTENT);
17. layout.setOrientation(LinearLayout.VERTICAL);
19. //文本text
20. TextView text = new TextView(getApplicationContext());

1. //設置文本屬性
2. LinearLayout textLayout = new LinearLayout(getApplicationContext());
3. LinearLayout.LayoutParams textParm = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,ViewGroup.LayoutParams.WRAP_CONTENT);
4. textLayout.setOrientation(LinearLayout.HORIZONTAL);
5. text.setText("just for test");
6. text.setTextSize(20);

1. //將文本add到線性布局器中
2. layout.addView(text, textParm);
3. //button
4. Button btn = new Button(getApplicationContext());
5. LinearLayout btnLayout = new LinearLayout(getApplicationContext());
6. LinearLayout.LayoutParams btnParm = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,ViewGroup.LayoutParams.WRAP_CONTENT);
7. btnLayout.setOrientation(LinearLayout.HORIZONTAL);
8. btn.setText("just for button");
9. btn.setTextSize(20);
10. layout.addView(btn, btnParm);
11. //設置activity布局采用layout線性布局，布局方式采用layoutParm方式。
12. super.setContentView(layout,layoutParm);
13. }

先new一個線性布局，設置其布局的屬性。然後new一個文本，設置好其參數，然後add到layout中去。

button也是如此，

最終將線性布局器設置為activity的總布局方式。

運行效果如下：