包android.support.v4.app不存在

时间:2018-05-31 14:37:43

标签: java android qt android-support-library

在我的Qt Android(5.6 +,最新的SDK和NDK 10d)应用程序中,我需要在运行时因targetApi 26请求权限。From Google docs我发现我必须做这样的事情:< / p>

import android.Manifest.permission;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;

public class  MyActivity extends QtActivity implements ActivityCompat.OnRequestPermissionsResultCallback
{
  private static final String[] LOCATION_PERMS = {
      permission.ACCESS_FINE_LOCATION
  };
  private static final int LOCATION_REQUEST = 1337;

    private boolean hasPermission(String perm)
  {
    return (PackageManager.PERMISSION_GRANTED == checkSelfPermission(perm));
  }

  public boolean canAccessLocation()
  {
    return hasPermission(permission.ACCESS_FINE_LOCATION);
  }

  @Override
  public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults)
  {
    //Figure out what was given to us
    switch(requestCode)
    {
      case LOCATION_REQUEST:
        if (canAccessLocation())
          Log.i(TAG, "Access to location is granted");
        else {
          Log.e(TAG, "Access to location is denied");
          finish();
        }
        break;
    }
  }

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
      //Ensure we can run the app
      if (!canAccessLocation())
        requestPermissions( LOCATION_PERMS, LOCATION_REQUEST );
    }
  }
}

我还安装了Android支持存储库: enter image description here

这是我的build.gradle:

buildscript {
    repositories {
        jcenter()
        google()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.0'
    }
}

allprojects {
    repositories {
        jcenter()
        google()
    }
}

apply plugin: 'com.android.application'

dependencies {
    compile "com.android.support:support-v4:27.0.2"
    compile "com.android.support:support-v13:27.0.2"
    compile fileTree(dir: 'libs', include: ['*.jar'])
}

但是我收到错误:包android.support.v4.app不存在。我也试图在我的工作站上找到android-support-v4.jar,但没有成功。添加

compile 'com.android.support:support-v4:+'

from here没有任何区别。

一件重要的事情:我的项目是在CMake的帮助下从命令行构建的,我不能使用像Android Studio或Eclipse这样的任何IDE。我错过了什么?

谢谢!

更新: 完整错误列表: enter image description here

2 个答案:

答案 0 :(得分:0)

实际上,通过应用Android Studio中的依赖项,更新后的build.gradle可以使用以下设置:

apply plugin: 'com.android.application'

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:25.0.1'
    compile 'com.android.support:design:25.0.1'

}

我还猜你需要导入Activity:

import android.app.Activity;

答案 1 :(得分:0)

我不知道您是否还有这个问题,但是万一有人想知道...

我将可编译SDK版本更改为:27:Android 8.1(奥利奥) 26:Android 8.0(奥利奥) 并在build.grade

dependencies {
    implementation 'com.android.support:appcompat-v7:27.0.0'
    implementation 'com.android.support:design:27.0.0'
    implementation 'com.android.support:support-v4:27.1.1'
}

显然android.support:support中的27.1.1做到了这一点(27.0.0无效)。 希望对您有所帮助(: