java - 警告框不重复，输入检查不工作

Question

我正在尝试为个人元素制作一个小型 Android 应用程序，但我的代码现在有两个问题:

1. 代码应该执行以下直到

isAlarm == false;

                do {
                (new BTask(context)).execute();
                try {
                    Thread.sleep(500);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            } while (isAlarm);

但它只执行一次。

1. 我希望它只在输入正确密码时关闭对话框，但它每次都关闭它而不执行命令:

isAlarm = false;

我知道，代码不是很漂亮，但我还在学习中。 =)

package top.sysop.myapplication;

import android.Manifest;
import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.ToneGenerator;
import android.os.AsyncTask;
import android.os.Vibrator;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.InputType;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "";
    public static Button btn1;
    public static Button btn2;
    public static Button btn3;
    private MediaPlayer mMediaPlayer;
    boolean isAlarm;
    private String m_Text = "";
    Context context;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.context=this;
        setContentView(R.layout.activity_main);
        dialogevent3();
    }
    public void dialogevent3() {
        int i=1;
        btn3 = (Button) findViewById(R.id.dial3);
        btn3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                builder.setTitle("Diebstahl!");
// Set up the input
                final EditText input = new EditText(MainActivity.this);
// Specify the type of input expected; this, for example, sets the input as a password, and will mask the text
                input.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
                builder.setView(input);
// Set up the buttons
                builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        m_Text = input.getText().toString();
                        if (m_Text.equals("pass"))
                        {
                            //end
                            isAlarm = false;
                        }
                        else
                        {
                            //repeat
                            dialog.dismiss();
                            dialogevent3();
                        }
                    }
                });
                do {
                    (new BTask(context)).execute();
                    try {
                        Thread.sleep(500);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                } while (isAlarm);
            //    alert.show();
                builder.show();
            }
        });
    }
}

Answer 1

您没有初始化 isAlarm 的值，因此它包含默认值 false。有一些变化，比如

初始化boolean isAlarm = true

将 while (isAlarm) 更改为 while (!isAlarm)

希望对你有帮助