Android 错误解决方案集锦

一、Caused by: java.lang.ClassCastException: androidx.multidex.MultiDexApplication cannot be cast to com.example.firecontrol.MainApplication

解决方法，在manifest.xml中添加：

<application

    android:name=".MainApplication"

二、Caused by: android.view.InflateException: Binary XML file line #13: Error inflating class com.google.android.material.tabs.TabLayout

     Caused by: java.lang.reflect.InvocationTargetException

须要将activity当前的theme继承Theme.AppCompat

<style name="AppBaseTheme" parent="Theme.AppCompat.Light" />

 

<style name="AppTheme" parent="AppBaseTheme">

    <item name="android:textColor">@color/colorBlack</item>

    <item name="android:windowBackground">@color/colorWhite</item>

    <item name="colorPrimary">@color/colorPrimary</item>

    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>

    <item name="colorAccent">@color/colorAccent</item>

</style>

三、Java异常：java.lang.InstantiationException

出现这个异常可能有不少缘由，个人缘由是把class用abstact修饰了

四、java.lang.BootstrapMethodError: Exception from call site #1 bootstrap method

android {

   ······

    compileOptions{

        sourceCompatibility JavaVersion.VERSION_1_8

        targetCompatibility JavaVersion.VERSION_1_8

    }

 }

五、Android studio 3.5格式化xml层级错乱问题

Settings > Editor > Code Style > XML > Set from… > Predefined Style > Android

六、com.google.gson.JsonSyntaxException: java.lang.NumberFormatException: For input string

问题出现的缘由：

javaBean中有一个变量是Integer

json对象是String

七、Static interface methods are only supported starting with Android N (--min-api 24)

在build.gradle文件Android下添加compileOptions

android {

   ······

    compileOptions{

        sourceCompatibility JavaVersion.VERSION_1_8

        targetCompatibility JavaVersion.VERSION_1_8

    }

 }

八、Couldn't find meta-data for provider with authority

问题出现缘由：缺乏下载权限

<!-- 7.0下载权限 -->
<provider
       android:name="androidx.core.content.FileProvider"
       android:authorities="自定义"
       android:exported="false"
       android:grantUriPermissions="true">

<!-- 元数据 -->
<meta-data
       android:name="android.support.FILE_PROVIDER_PATHS"
       android:resource="@xml/file_path" />
</provider>

<service android:name=".download.DownloadService" />

九、PackageInstaller: Requesting uid 10215 needs to declare permission android.permission.REQUEST_INSTALL_PACKAGES

解决办法：mainfest中添加适配权限

<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" /> <!-- 适配8.0 -->

十、java.lang.RuntimeException: Failure delivering result ResultInfo{who=@android:requestPermissions:, request=65813, result=-1, data=Intent { act=android.content.pm.action.REQUEST_PERMISSIONS (has extras) }} to activity {com.cloudXF.app/com.cloudXF.app.index.MainActivity}: java.lang.RuntimeException: Cannot execute method locationTask because it is non-void method and/or has input parameters.

出现场景：Android 6.0 以上使用EasyPermissions动态申请权限

//AfterPermissionGranted只能与不带参数的方法一块儿使用,不然会崩溃@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    // Forward results to EasyPermissions
    EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);
}

@Override
public void onPermissionsGranted(int requestCode, @NonNull List<String> perms) {
}

@Override
public void onPermissionsDenied(int requestCode, @NonNull List<String> perms) {
}

@AfterPermissionGranted(Constant.REQUEST_CODE.LOCATION)
public void locationTask() {//个人错误缘由：locationTask方法携带参数
    String[] perms = {Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION};
    if (EasyPermissions.hasPermissions(getActivity(), perms)) {
        locate();
    } else {
        EasyPermissions.requestPermissions(this, getString(R.string.location_permission), Constant.REQUEST_CODE.LOCATION, perms);
    }
}

十一、BuildConfig.DEBUG一直返回false

个人错误缘由：自动导入的BuildConfig不是应用程序中，而是导入的其余库的BuildConfig

十二、RecyclerView报错

（1）java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid item position 4(offset:4).state:10 androidx.recyclerview.widget.RecyclerView{e9d59c4 VFED..... ......I. 0,108-174,858 #7f080179 app:id/rv_floor}, adapter:com.cloudXF.app.business.home.adapter.FloorAdapter@bf120ad, layout:androidx.recyclerview.widget.LinearLayoutManager@6dcfe2, context:com.cloudXF.app.index.MainActivity@ee48f73

解决方法：重写LinearLayoutManager

public class CommonLayoutManager extends LinearLayoutManager { public CommonLayoutManager(Context context) { super(context); } public CommonLayoutManager(Context context, int orientation, boolean reverseLayout) { super(context, orientation, reverseLayout); } public CommonLayoutManager(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { super(context, attrs, defStyleAttr, defStyleRes); } @Override public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) { try { super.onLayoutChildren(recycler, state); } catch (IndexOutOfBoundsException e) { e.printStackTrace(); } } }

1三、Canvas：Invalid Region.Op - only INTERSECT and DIFFERENCE are allowed

报错代码：canvas.clipRect(mClipBounds, Region.Op.UNION);

解决方案：

  if  (Build.VERSION.SDK_INT >= 26) {
      canvas.clipRect(mClipBounds);
  }  else {
      canvas.clipRect(mClipBounds, Region.Op.UNION);
  }

1四、Error:Could not resolve all dependencies for configuration ':classpath'

缘由分析：Android Studio 3.0 中 Google 将本身的依赖包放在了 google ( )，个人项目没有添加google()仓库

解决方案：

  repositories {
      google() //Google仓库
      jcenter() //JCenter仓库
  }

1五、Your project path contains non-ASCII characters.

缘由：项目路经包含中文