当变量在onCreate范围内时,它工作正常,但我也需要在onDestroy范围内使用变量,所以我把它作为全局变量。但是我的应用程序在打开时关闭了。
public class MainActivity extends Activity {
GamePanel gamePanel = new GamePanel (this);
EditText editText = (EditText) getLayoutInflater().inflate(R.layout.edit_text_template, null);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//Remove title
requestWindowFeature(Window.FEATURE_NO_TITLE);
//Set fullscreen
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
RelativeLayout.LayoutParams gameParams = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.MATCH_PARENT);
gamePanel.setLayoutParams(gameParams);
RelativeLayout.LayoutParams etParams = new RelativeLayout.LayoutParams(
300, 100);
etParams.leftMargin = 200;
etParams.topMargin = 800;
editText.setLayoutParams(etParams);
RelativeLayout content = new RelativeLayout(this);
content.addView(gamePanel);
content.addView(editText);
setContentView(content);
}
@Override
protected void onDestroy(){
super.onDestroy();
}
}
如代码所示,我想使用gamePanel和editText作为全局变量。知道怎么做吗?或者我错过了什么?提前谢谢。
答案 0 :(得分:3)
您应该在OnCreate()
中初始化您的变量 GamePanel gamePanel;
EditText editText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
gamePanel = new GamePanel (this);
editText = (EditText) getLayoutInflater().inflate(R.layout.edit_text_template, null);
...}