1.2 Android 6.0 新特性

1.2.2 运行时权限机制

1.处理不再询问选项

其实就是当你选择不再询问的时候，会弹出一个提示

@Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        if (requestCode == PERMISSIONS_REQUEST_CALL_PHONE) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                callPhone();
            } else {
                //当选择不再询问，shouldShowRequestPermissionRationale返回false
                if (!ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CALL_PHONE)) {
                    AlertDialog dialog = new AlertDialog.Builder(this)
                            .setMessage("该功能需要访问电话的权限，不开启将无法正常工作！")
                            .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog, int which) {
                                }
                            }).create();
                    dialog.show();
                }
                return;
            }
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }

KDrqC8.png

KDrxDs.png

2.PermissionsDispatcher解析

1.什么是PermissionsDispatcher

其实就是一个权限申请框架，

2.怎么使用

1.导入依赖

 implementation 'com.github.hotchemi:permissionsdispatcher:2.3.2'
    annotationProcessor 'com.github.hotchemi:permissionsdispatcher-processor:2.3.2'

2.权限的讲解

• RuntimePermissions：必需的注释，它用来注册一个 Activity 或 Fragment，使它们可以处理权限。
• NeedsPermission：必需的注释，在需要获取权限的地方注释，用来获取权限。
• OnShowRationale：提示用户为何要开启此权限。在用户选择拒绝后，再次需要访问该权限时调用。
• OnPermissionDenied：用户选择拒绝时的提示。
• OnNeverAskAgain：用户选择不再询问后的提示。

3.在onRequestPermissionsResult中注册一下框架

   @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    //这里注意一下，要注册一下
        ThirdPartyActivityPermissionsDispatcher.onRequestPermissionsResult(this, requestCode, grantResults);
    }

4.代码：

//类的权限
@RuntimePermissions
public class ThirdPartyActivity extends AppCompatActivity {
    private Button bt_call;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_third_party);
        bt_call = (Button) this.findViewById(R.id.bt_call);
        bt_call.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //检查权限
                ThirdPartyActivityPermissionsDispatcher.callWithCheck(ThirdPartyActivity.this);
            }
        });
    }

    @NeedsPermission(Manifest.permission.CALL_PHONE)
//在需要获取权限的地方注释
    void call() {
        Intent intent = new Intent(Intent.ACTION_CALL);
        Uri data = Uri.parse("tel:" + "10086");
        intent.setData(data);
        try {
            startActivity(intent);
        } catch (SecurityException e) {
            e.printStackTrace();
        }
    }

    @OnShowRationale(Manifest.permission.CALL_PHONE)
//提示用户为何要开启此权限
    void showWhy(final PermissionRequest request) {
        new AlertDialog.Builder(this)
                .setMessage("提示用户为何要开启此权限")
                .setPositiveButton("知道了", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        request.proceed();//再次执行权限请求
                    }
                })
                .show();
    }

    @OnPermissionDenied(Manifest.permission.CALL_PHONE)
//用户选择拒绝时的提示
    void showDenied() {
        Toast.makeText(this, "用户选择拒绝时的提示", Toast.LENGTH_SHORT).show();
    }

    @OnNeverAskAgain(Manifest.permission.CALL_PHONE)
//用户选择不再询问后的提示
    void showNotAsk() {
        new AlertDialog.Builder(this)
                .setMessage("该功能需要访问电话的权限，不开启将无法正常工作！")
                .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                    }
                }).show();
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    //这里注意一下，要注册一下
        ThirdPartyActivityPermissionsDispatcher.onRequestPermissionsResult(this, requestCode, grantResults);
    }
}

5.注意注意：需要先在AndoirdManifest中注册权限