在android中创建警报对话框时出现java.lang.IllegalStateException

Question

这个问题已经有答案了:

You need to use a Theme.AppCompat theme (or descendant) with this activity. Change to Theme.AppCompat causes other error (15 个回答)

已关闭 4 年前。

这里是初学者..

我无法创建警报对话框。当我使用 `alertDialog.show();

时会发生这种情况

这个错误--

java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.

我的代码，

 logoImage.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            AlertDialog.Builder builder=new AlertDialog.Builder(getApplicationContext());
            builder.setTitle("hello");
            builder.setMessage("hello how are you");
            AlertDialog alertDialog= builder.create();
            alertDialog.show(); //line 


        }

    });

我的日志猫..

 java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
    at android.support.v7.app.AppCompatDelegateImpl.createSubDecor(AppCompatDelegateImpl.java:555)
    at android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor(AppCompatDelegateImpl.java:518)
    at android.support.v7.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:466)
    at android.support.v7.app.AppCompatDialog.setContentView(AppCompatDialog.java:94)
    at android.support.v7.app.AlertController.installContent(AlertController.java:232)
    at android.support.v7.app.AlertDialog.onCreate(AlertDialog.java:279)
    at android.app.Dialog.dispatchOnCreate(Dialog.java:394)
    at android.app.Dialog.show(Dialog.java:283)
    at com.abmm.include_activity$15.onClick(include_activity.java:459)

谢谢各位 friend ..

Answer 1

改变，

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

至

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