@android:style/Theme.Translucent引发的报错

  <activity android:name=".XXXXActivity"
            android:exported="true"
            android:launchMode="singleTop"
            android:screenOrientation="portrait"
            android:configChanges="orientation|keyboardHidden|screenSize"
            android:theme="@android:style/Theme.Translucent"/>
        <activity android:name=".MainActivity">

设置主题的

@android:style/Theme.Translucent

报错

java.lang.IllegalStateException: You need to use a Theme.AppCompat
theme (or descendant) with this activity.
看着错误提示是@android:style/Theme.Translucent不属于 Theme.AppCompat theme

解决方式：

当前的

MyActivity   extends AppCompatActivity

修改为

 MyActivity  extends Activity

具体源码大致
Activity

  @Override
    public void setTheme(int resid) {
        super.setTheme(resid);
        mWindow.setTheme(resid);
    }

AppCompatActivity

  /**
     * @return The {@link AppCompatDelegate} being used by this Activity.
     */
    @NonNull
    public AppCompatDelegate getDelegate() {
        if (mDelegate == null) {
            mDelegate = AppCompatDelegate.create(this, this);
        }
        return mDelegate;
    }

........
   @Override
    public void setTheme(@StyleRes final int resId) {
        super.setTheme(resId);
        getDelegate().setTheme(resId);
    }

通过代码查找
AppCompatDelegateImpl的createSubDecor方法中

    TypedArray a = mContext.obtainStyledAttributes(R.styleable.AppCompatTheme);

        if (!a.hasValue(R.styleable.AppCompatTheme_windowActionBar)) {
            a.recycle();
            throw new IllegalStateException(
                    "You need to use a Theme.AppCompat theme (or descendant) with this activity.");
        }

看出来AppCompatTheme里没有找到Translucent所以报错了。

本文地址：https://blog.csdn.net/litaowansui/article/details/110630633