android简单问题大家都看看(重谢)

Question

运行的时候插入第二个表情的时候老报错,错误: ERROR/AndroidRuntime(7458): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. 告诉帮忙解决一下public class MainActivity extends Activity {
private static String TAG="MainActivity";
private Button expressionButton;
private LayoutInflater inflater;
private GridView mGridView;
private EditText et;
private Dialog dialog; 
private int[]face=new int[]
{ R.drawable.smiley_b_close,R.drawable.smiley_colon_apostrophe_open,
R.drawable.smiley_colon_close,R.drawable.smiley_colon_d,
R.drawable.smiley_colon_dollar,R.drawable.smiley_colon_e,
R.drawable.smiley_colon_o,R.drawable.smiley_colon_open,
R.drawable.smiley_colon_p,R.drawable.smiley_colon_pipe,
R.drawable.smiley_colon_s,R.drawable.smiley_colon_slash,
R.drawable.smiley_colon_star,R.drawable.smiley_colon_three,
R.drawable.smiley_colon_x,R.drawable.smiley_greater_than_colon_open,
R.drawable.smiley_kik,R.drawable.smiley_less_than_slash_three,
R.drawable.smiley_less_than_three,R.drawable.smiley_semicolon_close
};
private ImageGetter imageGetter = new ImageGetter() {

@Override
public Drawable getDrawable(String source) {
int id = Integer.parseInt(source);
Drawable draw = getResources().getDrawable(id);
draw.setBounds(0, 0, draw.getIntrinsicWidth(), draw.getIntrinsicHeight());
return draw;
}
};
@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        et=(EditText) findViewById(R.id.EditText1);
        expressionButton = (Button) findViewById(R.id.expressionButton);
        inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View layout = inflater.inflate(R.layout.customdialog, null);
        mGridView  = (GridView) layout.findViewById(R.id.gridview);
        mGridView.setAdapter(new ImageAdapter(MainActivity.this));
        
        expressionButton.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// MyDialog myDialog = new MyDialog(MainActivity.this);
// myDialog.show();
dialog =new Dialog(MainActivity.this);
dialog.setContentView(mGridView);
dialog.setTitle("表情选择");
dialog.show();
}
});
        mGridView.setOnItemClickListener(new OnItemClickListener() {
        
         @Override
         public void onItemClick(AdapterView<?> arg0, View arg1, int position,
         long id) {
         alertFace(position);
         }
         public void alertFace(int position) {
         et.append(Html.fromHtml("<img src='"+face[position]+"'/>",imageGetter,null));
         //e_text  = et.getText().toString();
         dialog.dismiss();
         }
        });
        
    }
@Override
protected void onStart() {
super.onStart();
}
}

Answer 1

            public void onClick(View v) {
//                MyDialog myDialog = new MyDialog(MainActivity.this);
//                myDialog.show();
                dialog =new Dialog(MainActivity.this);
                dialog.setContentView(mGridView);
                dialog.setTitle("表情选择");
                dialog.show();
            }
        });
感觉问题出在这里，   dialog 不是局部的嘛， 为啥每次都去new呢？   dialog.setContentView()这个需要？

Answer 2

The specified child already has a parent. You must call removeView() on the child's parent first根据提示一个子控件不能有两个parent问题在这里。
        public Drawable getDrawable(String source) {
            int id = Integer.parseInt(source);
            Drawable draw = getResources().getDrawable(id);
            draw.setBounds(0, 0, draw.getIntrinsicWidth(), draw.getIntrinsicHeight());
            return draw;
        }

Answer 3

也有可能在这里
dialog =new Dialog(MainActivity.this);
dialog.setContentView(mGridView);
试试重新new个实例加进去

Answer 4

搞定了 dialog没判断 加上
if(dialog!=null) {
  dialog.show();
}else {
  new ...
}