Question

我在创建自定义对话框时遵循了Android文档。当我单击启动我的自定义对话框应用程序的按钮时。崩溃。我该如何开始对此进行故障排除？

对话框：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/relativeLayout1" android:gravity="center_vertical" android:layout_height="wrap_content" android:layout_width="fill_parent">
<CheckBox android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/chkBlueTooth" android:id="@+id/chkBlueTooth" android:layout_below="@+id/chkAudio" android:layout_alignLeft="@+id/chkAudio"></CheckBox>
<Button android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_below="@+id/chkBlueTooth" android:layout_alignLeft="@+id/chkBlueTooth" android:id="@+id/btnOK" android:text="@string/btnOK"></Button>
<CheckBox android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/chkNetwork" android:id="@+id/chkNetwork" android:layout_above="@+id/chkBlueTooth" android:layout_toRightOf="@+id/chkBlueTooth"></CheckBox>
<CheckBox android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/chkWifi" android:id="@+id/chkWifi" android:layout_below="@+id/chkNetwork" android:layout_alignLeft="@+id/chkNetwork" android:layout_alignRight="@+id/chkNetwork"></CheckBox>
<CheckBox android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="@string/chkAudio" android:id="@+id/chkAudio" android:layout_below="@+id/txtChoose" android:layout_alignLeft="@+id/txtChoose"></CheckBox>
</RelativeLayout>

对话框的代码： static final int TIME_DIALOG_ID = 0; static final int POWER_OFF_OPTIONS = 1;

@覆盖 protected Dialog onCreateDialog（int id）{ 对话框对话框; switch（id）{ case TIME_DIALOG_ID：返回新的TimePickerDialog（这个， mTimeSetListener，mHour24，mMinute，false）;

        case POWER_OFF_OPTIONS:
            AlertDialog.Builder builder;
            AlertDialog alertDialog;

            Context mContext = getApplicationContext();
            LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(LAYOUT_INFLATER_SERVICE);
            View layout = inflater.inflate(R.layout.options,
                    (ViewGroup)findViewById(R.id.relativeLayout1));
            //Capture view elements
            mChkAudio = (CheckBox) findViewById(R.id.chkAudio);
            mChkBluetooth = (CheckBox) findViewById(R.id.chkBlueTooth);
            mChkNetwork = (CheckBox) findViewById(R.id.chkNetwork);
            mChkWifi = (CheckBox) findViewById(R.id.chkWifi);
            mBtnOK = (Button) findViewById(R.id.btnOK);
            mBtnOK.setOnClickListener(new View.OnClickListener() {
                public void onClick(View v) {
                  DismissPowerOptions();
                    }
            }); 
            builder = new AlertDialog.Builder(mContext);
            builder.setView(layout);
            alertDialog = builder.create();
            //return builder;
        default:
            dialog = null;
        }
        return dialog;
    }

显示对话框并崩溃应用程序的按钮：

  mBtnPowerOffOptions.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            //stuff for Options dialog
            showDialog(POWER_OFF_OPTIONS);
        }
    });

Answer 1

你在错误的对象上调用findViewById;父视图（或活动）。

在builder.setView（...）之后执行

            AlertDialog myDialog = builder.create();

现在您可以调用findViewById

            //Capture view elements
            mChkAudio = (CheckBox) myDialog.findViewById(R.id.chkAudio);
              .
              .
              .

启动自定义对话框

1 个答案: