如何在Android上显示是/否对话框？

Question

是的，我知道有AlertDialog.Builder，但我很震惊地知道在Android中显示对话框有多困难（好吧，至少不是程序员友好）。

我曾经是一名.NET开发人员，我想知道是否有以下任何类似的Android？

if (MessageBox.Show("Sure?", "", MessageBoxButtons.YesNo) == DialogResult.Yes){
    // Do something...
}

Answer 1

AlertDialog.Builder真的不是那么难用。首先肯定会有点吓人，但是一旦你使用了它，它既简单又强大。我知道你说你知道如何使用它，但这只是一个简单的例子：

DialogInterface.OnClickListener dialogClickListener = new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        switch (which){
        case DialogInterface.BUTTON_POSITIVE:
            //Yes button clicked
            break;

        case DialogInterface.BUTTON_NEGATIVE:
            //No button clicked
            break;
        }
    }
};

AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setMessage("Are you sure?").setPositiveButton("Yes", dialogClickListener)
    .setNegativeButton("No", dialogClickListener).show();

如果您还有其他是/否框，那么您也可以重复使用DialogInterface.OnClickListener。

如果您正在View.OnClickListener内创建对话框，则可以使用view.getContext()来获取上下文。或者，您可以使用yourFragmentName.getActivity()。

Answer 2

试试这个：

AlertDialog.Builder builder = new AlertDialog.Builder(this);

builder.setTitle("Confirm");
builder.setMessage("Are you sure?");

builder.setPositiveButton("YES", new DialogInterface.OnClickListener() {

    public void onClick(DialogInterface dialog, int which) {
        // Do nothing but close the dialog

        dialog.dismiss();
    }
});

builder.setNegativeButton("NO", new DialogInterface.OnClickListener() {

    @Override
    public void onClick(DialogInterface dialog, int which) {

        // Do nothing
        dialog.dismiss();
    }
});

AlertDialog alert = builder.create();
alert.show();

Answer 3

史蒂夫H的回答很明显，但是这里有更多的信息：对话框的工作原理是因为Android中的对话是异步的（在显示对话框时执行不会停止）。因此，您必须使用回调来处理用户的选择。

查看此问题，以便在Android和.NET之间进行更长时间的讨论（因为它与对话框相关）： Dialogs / AlertDialogs: How to "block execution" while dialog is up (.NET-style)

Answer 4

这对我有用：

AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext());

    builder.setTitle("Confirm");
    builder.setMessage("Are you sure?");

    builder.setPositiveButton("YES", new DialogInterface.OnClickListener() {

        public void onClick(DialogInterface dialog, int which) {

            // Do nothing, but close the dialog
            dialog.dismiss();
        }
    });

    builder.setNegativeButton("NO", new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which) {

            // Do nothing
            dialog.dismiss();
        }
    });

    AlertDialog alert = builder.create();
    alert.show();

Answer 5

询问一个人是否要打电话给对话..

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.Toast;

public class Firstclass extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {    
        super.onCreate(savedInstanceState);    
        setContentView(R.layout.first);

        ImageView imageViewCall = (ImageView) findViewById(R.id.ring_mig);

        imageViewCall.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v){
                try{
                    showDialog("0728570527");
                } catch (Exception e){
                    e.printStackTrace();
                }                   
            }    
        });    
    }

    public void showDialog(final String phone) throws Exception {
        AlertDialog.Builder builder = new AlertDialog.Builder(Firstclass.this);

        builder.setMessage("Ring: " + phone);       

        builder.setPositiveButton("Ring", new DialogInterface.OnClickListener(){
            @Override
            public void onClick(DialogInterface dialog, int which){

                Intent callIntent = new Intent(Intent.ACTION_DIAL);// (Intent.ACTION_CALL);                 
                callIntent.setData(Uri.parse("tel:" + phone));
                startActivity(callIntent);

                dialog.dismiss();
            }
        });

        builder.setNegativeButton("Abort", new DialogInterface.OnClickListener(){   
            @Override
            public void onClick(DialogInterface dialog, int which){
                dialog.dismiss();
            }
        });         
        builder.show();
    }    
}

Answer 6

感谢nikki，您的回答只是通过添加我想要的操作来帮助我改善现有的

AlertDialog.Builder builder = new AlertDialog.Builder(this);

builder.setTitle("Do this action");
builder.setMessage("do you want confirm this action?");

builder.setPositiveButton("YES", new DialogInterface.OnClickListener() {

    public void onClick(DialogInterface dialog, int which) {
        // Do do my action here

        dialog.dismiss();
    }

});

builder.setNegativeButton("NO", new DialogInterface.OnClickListener() {

    @Override
    public void onClick(DialogInterface dialog, int which) {
        // I do not need any action here you might
        dialog.dismiss();
    }
});

AlertDialog alert = builder.create();
alert.show();

Answer 7

史蒂夫的回答是正确的，虽然过时的碎片。这是FragmentDialog的一个例子。

班级：

public class SomeDialog extends DialogFragment {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        return new AlertDialog.Builder(getActivity())
            .setTitle("Title")
            .setMessage("Sure you wanna do this!")
            .setNegativeButton(android.R.string.no, new OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // do nothing (will close dialog)
                }
            })
            .setPositiveButton(android.R.string.yes,  new OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    // do something
                }
            })
            .create();
    }
}

开始对话：

            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            // Create and show the dialog.
            SomeDialog newFragment = new SomeDialog ();
            newFragment.show(ft, "dialog");

您也可以让类实现onClickListener并使用它而不是嵌入式侦听器。

Answer 8

在Kotlin：

AlertDialog.Builder(this)
    .setTitle(R.string.question_title)
    .setMessage(R.string.question_message)
    .setPositiveButton(android.R.string.yes) { _, _ -> yesClicked() }
    .setNegativeButton(android.R.string.no) { _, _ -> noClicked() }
    .show()

Answer 9

匿名显示对话框作为命令链＆amp;没有定义另一个对象：

 new AlertDialog.Builder(this).setTitle("Confirm Delete?")
                        .setMessage("Are you sure?")
                        .setPositiveButton("YES",
                                new DialogInterface.OnClickListener() {
                                    public void onClick(DialogInterface dialog, int which) {

                                       // Perform Action & Dismiss dialog                                 
                                        dialog.dismiss();
                                    }
                                })
                        .setNegativeButton("NO", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                // Do nothing
                                dialog.dismiss();
                            }
                        })
                        .create()
                        .show();

Answer 10

这里的所有答案归结为冗长而不是读者友好的代码：正是这个人想要避免的。对我来说，最简单的方法是在这里使用lambdas：

new AlertDialog.Builder(this)
        .setTitle("Are you sure?")
        .setMessage("If you go back you will loose any changes.")
        .setPositiveButton("Yes", (dialog, which) -> {
            doSomething();
            dialog.dismiss();
        })
        .setNegativeButton("No", (dialog, which) -> dialog.dismiss())
        .show();

Android中的Lambdas需要retrolambda插件（https://github.com/evant/gradle-retrolambda），但无论如何它在编写更干净的代码方面都非常有用。

Answer 11

你可以在Kotlin这么容易地做到：

 alert("Testing alerts") {
    title = "Alert"
    yesButton { toast("Yess!!!") }
    noButton { }
}.show()

Answer 12

感谢。我使用API​​ Level 2（Android 1.1）而不是BUTTON_POSITIVE和BUTTON_NEGATIVE我必须使用BUTTON1和BUTTON2。

Answer 13

1.创建AlertDialog设置消息，标题和正面，负面按钮：

final AlertDialog alertDialog = new AlertDialog.Builder(this)
                        .setCancelable(false)
                        .setTitle("Confirmation")
                        .setMessage("Do you want to remove this Picture?")
                        .setPositiveButton("Yes",null)
                        .setNegativeButton("No",null)
                        .create();

2.现在找到DialogInterface上的两个按钮然后单击setOnClickListener（）：

alertDialog.setOnShowListener(new DialogInterface.OnShowListener() {
            @Override
            public void onShow(DialogInterface dialogInterface) {
                Button yesButton = (alertDialog).getButton(android.app.AlertDialog.BUTTON_POSITIVE);
                Button noButton = (alertDialog).getButton(android.app.AlertDialog.BUTTON_NEGATIVE);
                yesButton.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        //Now Background Class To Update Operator State
                        alertDialog.dismiss();
                        Toast.makeText(GroundEditActivity.this, "Click on Yes", Toast.LENGTH_SHORT).show();
                        //Do Something here 
                    }
                });

                noButton.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        alertDialog.dismiss();
                        Toast.makeText(GroundEditActivity.this, "Click on No", Toast.LENGTH_SHORT).show();
                        //Do Some Thing Here 
                    }
                });
            }
        });

3.显示Alertdialog：

alertDialog.show();

注意：请勿忘记使用AlertDialog的最终关键字。

Answer 14

Kotlin的实现。

您可以创建一个简单的函数，如下所示：

fun dialogYesOrNo(
        activity: Activity,
        title: String,
        message: String,
        listener: DialogInterface.OnClickListener
    ) {
        val builder = AlertDialog.Builder(activity)
        builder.setPositiveButton("Yes", DialogInterface.OnClickListener { dialog, id ->
            dialog.dismiss()
            listener.onClick(dialog, id)
        })
        builder.setNegativeButton("No", null)
        val alert = builder.create()
        alert.setTitle(title)
        alert.setMessage(message)
        alert.show()
    }

并这样称呼它：

dialogYesOrNo(
  this,
  "Question",
  "Would you like to eat?",
  DialogInterface.OnClickListener { dialog, id ->
    // do whatever you need to do when user presses "Yes"
  }
})

Answer 15

对于Android中的科特林 ：：

    override fun onBackPressed() {
        confirmToCancel()
    }

    private fun confirmToCancel() {
        AlertDialog.Builder(this)
            .setTitle("Title")
            .setMessage("Do you want to cancel?")
            .setCancelable(false)
            .setPositiveButton("Yes") {
                dialog: DialogInterface, _: Int ->
                dialog.dismiss()
                // for sending data to previous activity use
                // setResult(response code, data)
                finish()
            }
            .setNegativeButton("No") {
                dialog: DialogInterface, _: Int ->
                dialog.dismiss()
            }
            .show()
    } 

Answer 16

今天，我将以显示2个选项的方式在android中创建alertdialog示例 步骤1.创建一个activity_main.xml

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/rl"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="10dp"
    tools:context=".MainActivity"
    android:background="#d2ffe8"
    >
    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="This is a TextView."
        android:textSize="35dp"
        android:textColor="#ff3550"
        />
    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hide TextView"
        android:layout_below="@id/tv"
        />
</RelativeLayout>

第2步。创建一个类MainActivity.java

public class MainActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // Get reference of widgets from XML layout
        final RelativeLayout rl = (RelativeLayout) findViewById(R.id.rl);
        Button btn = (Button) findViewById(R.id.btn);
        final TextView tv = (TextView) findViewById(R.id.tv);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Build an AlertDialog
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                builder.setTitle("Select your answer.");
                builder.setMessage("Are you sure to hide?");
                // Set the alert dialog yes button click listener
                builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                        tv.setVisibility(View.GONE);
                    }
                });
                builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                        Toast.makeText(getApplicationContext(),
                                "No Button Clicked",Toast.LENGTH_SHORT).show();
                    }
                });
                AlertDialog dialog = builder.create();
                // Display the alert dialog on interface
                dialog.show();
            }
        });
  }
}

您在how to create a alertdialog in android处看到完整的代码

Answer 17

您可以为决策实施通用解决方案，并在另一种情况下使用，不仅仅是针对是/否，还可以使用动画或布局自定义警报：

像这样的东西;首先为传输数据创建一个类：

public class AlertDecision {

    private String question = "";
    private String strNegative = "";
    private String strPositive = "";

    public AlertDecision question(@NonNull String question) {
        this.question = question;
        return this;
    }

    public AlertDecision ansPositive(@NonNull String strPositive) {
        this.strPositive = strPositive;
        return this;
    }

    public AlertDecision ansNegative(@NonNull String strNegative) {
        this.strNegative = strNegative;
        return this;
    }

    public String getQuestion() {
        return question;
    }

    public String getAnswerNegative() {
        return strNegative;
    }

    public String getAnswerPositive() {
        return strPositive;
    }
}

在返回结果的界面

之后

public interface OnAlertDecisionClickListener {

    /**
     * Interface definition for a callback to be invoked when a view is clicked.
     *
     * @param dialog the dialog that was clicked
     * @param object The object in the position of the view
     */
    void onPositiveDecisionClick(DialogInterface dialog, Object object);
    void onNegativeDecisionClick(DialogInterface dialog, Object object);
}

现在您可以轻松创建一个用于访问的工具（在此类中，您可以为警报实现不同的动画或自定义布局）：

public class AlertViewUtils {

    public static void showAlertDecision(Context context,
                                         @NonNull AlertDecision decision,
                                         final OnAlertDecisionClickListener listener,
                                         final Object object) {

        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setMessage(decision.getQuestion());
        builder.setPositiveButton(decision.getAnswerPositive(),
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        listener.onPositiveDecisionClick(dialog, object);
                    }
                });

        builder.setNegativeButton(decision.getAnswerNegative(),
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        listener.onNegativeDecisionClick(dialog, object);
                    }
                });

        android.support.v7.app.AlertDialog dialog = builder.create();
        dialog.show();
    }
}

和活动或片段中的最后一次调用;你可以在你的情况下使用它或用于其他任务：

public class MainActivity extends AppCompatActivity {

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity);
        initResources();
    }

    public void initResources() {
        Button doSomething = (Button) findViewById(R.id.btn);
        doSomething.setOnClickListener(getDecisionListener());
    }

    private View.OnClickListener getDecisionListener() {
        return new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDecision decision = new AlertDecision()
                        .question("question ...")
                        .ansNegative("negative action...")
                        .ansPositive("positive action... ");
                AlertViewUtils.showAlertDecision(MainActivity.this,
                        decision, getOnDecisionListener(), v);
            }
        };
    }

    private OnAlertDecisionClickListener getOnDecisionListener() {
        return new OnAlertDecisionClickListener() {
            @Override
            public void onPositiveDecisionClick(DialogInterface dialog, Object object) {

                //do something like create, show views, etc...
            }

            @Override
            public void onNegativeDecisionClick(DialogInterface dialog, Object object) {
                //do something like delete, close session, etc ...
            }
        };
    }
} 

Answer 18

AlertDialog.Builder altBx = new AlertDialog.Builder(this);
    altBx.setTitle("My dialog box");
    altBx.setMessage("Welcome, Please Enter your name");
    altBx.setIcon(R.drawable.logo);

    altBx.setPositiveButton("Ok", new DialogInterface.OnClickListener()
    {
      public void onClick(DialogInterface dialog, int which)
      {
          if(edt.getText().toString().length()!=0)
          {
              // Show any message
          }
          else 
          {

          }
      }
    });
    altBx.setNeutralButton("Cancel", new DialogInterface.OnClickListener()
    {
      public void onClick(DialogInterface dialog, int which)
      {
          //show any message
      }

    });
  altBx.show();