Android 6.0+ 相機圖冊調用崩潰解決方案

最近客戶更新系統發現，以前的項目在調用相機的時候，閃退掉了，很奇怪，後來查閱後發現，Android 6.0以後需要程序授權相機權限，默認會給出提示，讓用戶授權，個人感覺這一特性很好，大概如下：

導入Android V4， V7包！

Android Studio 導入很簡單，右鍵項目後找到dependency就ok了。

繼承AppCompatActivity

public class MainActivity extends AppCompatActivity

引入需要的類庫

import android.support.design.widget.Snackbar;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;

檢查相機權限，並請求權限

// BEGIN_INCLUDE(camera_permission_request)
        if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                Manifest.permission.CAMERA)) {
            // Provide an additional rationale to the user if the permission was not granted
            // and the user would benefit from additional context for the use of the permission.
            // For example if the user has previously denied the permission.
            Log.i(TAG,
                    "Displaying camera permission rationale to provide additional context.");
            Snackbar.make(mLayout, R.string.permission_camera_rationale,
                    Snackbar.LENGTH_INDEFINITE)
                    .setAction(R.string.ok, new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            ActivityCompat.requestPermissions(MainActivity.this,
                                    new String[]{Manifest.permission.CAMERA},
                                    REQUEST_CAMERA);
                        }
                    })
                    .show();
        } else {

            // Camera permission has not been granted yet. Request it directly.
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA},
                    REQUEST_CAMERA);
        }
        // END_INCLUDE(camera_permission_request)

授權後接收回調方法：

 /**
     * Callback received when a permissions request has been completed.
     */
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
                                           @NonNull int[] grantResults) {

        if (requestCode == REQUEST_CAMERA) {
            // BEGIN_INCLUDE(permission_result)
            // Received permission result for camera permission.
            Log.i(TAG, "Received response for Camera permission request.");

            // Check if the only required permission has been granted
            } 
    }

混合應用開發解決方案

對於混合應用開發，有兩種解決方案：

1. 更改現有插件，添加權限訪問代碼（可能有有些麻煩）

2. 調用權限插件：

安裝：

cordova plugin add cordova-plugin-android-permissions@0.10.0

包含的權限

// Example 
permissions.ACCESS_COARSE_LOCATION
permissions.CAMERA
permissions.GET_ACCOUNTS
permissions.READ_CONTACTS
permissions.READ_CALENDAR
...

示例代碼

var permissions = cordova.plugins.permissions;
permissions.hasPermission(permissions.CAMERA, checkPermissionCallback, null);

function checkPermissionCallback(status) {
  if(!status.hasPermission) {
    var errorCallback = function() {
      console.warn('Camera permission is not turned on');
    }

    permissions.requestPermission(
      permissions.CAMERA,
      function(status) {
        if(!status.hasPermission) errorCallback();
      },
      errorCallback);
  }
}

沒有更新的趕緊更新吧！