Android AlertDialog未顯示

Question

我無法顯示警報對話框。 我將其置於調試模式，它貫穿了整個過程，然后即使調試器處理該行並繼續進行下一段代碼，也從不顯示菜單。

if(game.checkForPromotion(startRow, startCol)){
    AlertDialog.Builder builder = new AlertDialog.Builder(GameActivity.this);
    builder.setTitle("Pick a piece")
    .setItems(R.array.pieces_array, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            // The 'which' argument contains the index position
            // of the selected item
        }
    });
    builder.create().show();
    Log.d("GameActivity: ", "Is it crashing before this?");
}

Log.d("GameActivity: ", "Totally done with alert");

// More Code

Answer 1

我使用您的源代碼運行，將[R.array.pieces_array]的值更改為我的變量[final CharSequence [] items = {“這是setItems的內容”};] 。 我運行程序，警報對話框顯示OK。 源代碼顯示對話框確定：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    final CharSequence[] items = {"This is content of setItems"};
    AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
    builder.setTitle("Pick a piece")
            .setItems(items, new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    // The 'which' argument contains the index position
                    // of the selected item
                }
            });
    builder.create().show();
    Log.d("GameActivity: ", "Is it crashing before this?");
}

我認為您需要檢查文件中的其他源代碼。

Answer 2

試試這個，對我有用

new AlertDialog.Builder(getContext(), android.R.style.Theme_DeviceDefault_Light_Dialog_NoActionBar_MinWidth)
                    .setTitle("Title")
                    .setMessage("My message")
                    .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int which) {

                            // get ok button click

                        }
                    })
                    .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int which) {

                            // get cancel button click
                            dialog.dismiss();
                        }
                    })
                    .show();