如何修复此错误：您需要在此活动中使用Theme.AppCompat主题（或后代）-Java 学习之路

我搜索了所有的互联网网站来修复这个错误，但我不能 . 我只想用两个按钮创建AlertDialog是和否 .

这是我的代码：

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class DialogActivity extends AppCompatActivity {

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

    Button btnDialog= (Button) findViewById(R.id.btnDialog);
    btnDialog.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            showDialogMessage();
        }
    });
}

private void showDialogMessage(){

    AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext());
    // Add the buttons
    builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {
            // User clicked OK button
        }
    });
    builder.setNegativeButton("NO", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {
            // User cancelled the dialog
        }
    });

    AlertDialog dialog = builder.create();
    dialog.show();
}
}

这是我的风格：

<resources>

<!-- Base application theme. -->
<style name="AppTheme" parent="AppTheme.Base">
    <!-- Customize your theme here. -->
</style>

<style name="AppTheme.Base" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
</style>

这是我的风格（第21节）：

<resources>
<!-- extend one of the Theme.AppCompat themes -->
<style name="AppTheme" parent="AppTheme.Base">
    <!-- customize the color palette -->
    <item name="android:colorPrimary">@color/colorPrimary</item>
    <item name="android:colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="android:colorAccent">@color/colorAccent</item>
    <item name="android:windowTranslucentStatus">true</item>
    <item name="android:colorControlHighlight">@color/colorHighLight</item>
</style>
</resources>

这是显而易见的：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.saly.rastari" >   
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".DialogActivity"
            android:label="@string/title_activity_test"
            android:screenOrientation="portrait" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>       
    </application>
</manifest>

当我单击对话框按钮时出现此错误：

11-02 04:36:55.941 24352-24352/? E/AndroidRuntime: FATAL EXCEPTION: main
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime: Process: com.irannara.pda.pdaassistant, PID: 24352
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at android.support.v7.app.AppCompatDelegateImplV7.createSubDecor(AppCompatDelegateImplV7.java:309)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at android.support.v7.app.AppCompatDelegateImplV7.ensureSubDecor(AppCompatDelegateImplV7.java:278)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:252)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at android.support.v7.app.AppCompatDialog.setContentView(AppCompatDialog.java:76)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at android.support.v7.app.AlertController.installContent(AlertController.java:216)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at android.support.v7.app.AlertDialog.onCreate(AlertDialog.java:240)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at android.app.Dialog.dispatchOnCreate(Dialog.java:373)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at android.app.Dialog.show(Dialog.java:274)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at com.irannara.pda.pdaassistant.DialogActivity.showDialogMessage(DialogActivity.java:42)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at com.irannara.pda.pdaassistant.DialogActivity.access$000(DialogActivity.java:10)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at com.irannara.pda.pdaassistant.DialogActivity$1.onClick(DialogActivity.java:21)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at android.view.View.performClick(View.java:4780)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at android.view.View$PerformClick.run(View.java:19866)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at android.os.Handler.handleCallback(Handler.java:739)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at android.os.Handler.dispatchMessage(Handler.java:95)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at android.os.Looper.loop(Looper.java:135)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at android.app.ActivityThread.main(ActivityThread.java:5254)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Native Method)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Method.java:372)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
11-02 04:36:55.941 24352-24352/? E/AndroidRuntime:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
11-02 04:36:55.959 718-718/? E/EGL_emulation: tid 718: eglCreateSyncKHR(1209): error 0x3004 (EGL_BAD_ATTRIBUTE)

这些链接都无法帮助我：

和更多 .

我怎样才能解决这个问题？

5 回答

0
如果你有另一个样式文件在另一个值文件夹，如“ values-v11 ", " values-v14 ”...也编辑主题，并尝试在运行前清理您的应用程序 .

编辑：从您的活动更改 getApplicationContext() 到 this ：
```
AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext());
```
至
```
AlertDialog.Builder builder = new AlertDialog.Builder(this);
```
因为对话框也应该扩展 Appcompat 主题 .
回复于 2024-05-03T23:53:55+08:00

在你的style.xml文件中添加以下代码 -

style.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="AppTheme.Base" 
           parent="@style/Theme.AppCompat.Light">
    </style>
</resources>

在你的活动中也定义这样的主题

<activity
            android:name=".DialogActivity"
            android:label="@string/title_activity_test"
            android:screenOrientation="portrait" 
            android:theme="@android:style/AppTheme.Dialog">

要么

<activity
            android:name=".DialogActivity"
            android:label="@string/title_activity_test"
            android:screenOrientation="portrait" 
            android:theme="@style/AppTheme">

清理项目并再次运行..

回复于 2024-05-03T23:53:55+08:00

-1
如果有人遇到活动的这个问题，请尝试为您的活动明确配置主题 .
```
<activity android:name=".activities.BLEControlActivity" android:theme="@style/Theme.AppCompat.DayNight"></activity>
```
回复于 2024-05-03T23:53:55+08:00

我面对这样的情况，我设法解决它 . 这里是：

在MainActivity类中定义警报对话框，例如：

public class MainActivity extends AppCompatActivity {

   AlertDialog.Builder alertDialog;

然后在OnCreate（）方法上初始化它，如下所示：

alertDialog = new AlertDialog.Builder(this);

然后你可以在任何你喜欢的地方完成其余的提醒对话框自定义，如图标， Headers ，消息 . 在我的情况下，我在倒计时器的onFinish（）中使用它，如下所示：

public void onFinish() {

                alertDialog.setIcon(android.R.drawable.alert_light_frame);
                alertDialog.setTitle("You are done");
                alertDialog.setMessage("you got it");
                alertDialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                        runTheCode();
                    }
                });
                alertDialog.show();

回复于 2024-05-03T23:53:55+08:00

0
尝试在proguard规则中添加以下内容：
```
-keep public class com.google.android.gms.**
-keep class android.support.v7.** { *; }
-keep interface android.support.v7.** { *; }

-dontwarn com.google.android.gms.**
```
如果你正在使用

com.google.android.gms：play-services-ads：8.1.0

看看谷歌问题190237
回复于 2024-05-03T23:53:55+08:00

如何修复此错误：您需要在此活动中使用Theme.AppCompat主题（或后代）

5 回答

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