只要把 showDialog(0); 写在oncreat里,这样打开应用就会加载。
public class Test extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
showDialog(0);
Button button1 = (Button) findViewById(R.id.button1);
button1.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
showDialog(0);
}
});
}
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case 0: {
Dialog dialog = new AlertDialog.Builder(Test.this).setTitle("Question")
.setMessage("Are you sure that you want to quit?") // 设置内容
.setPositiveButton("Yes", // 设置确定按钮
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
setResult(RESULT_OK);
finish();
}
}).setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
}).create();// 创建
return dialog;
}
default: {
return null;
}
}
}
}