测试READ_PHONE_STATE的Android M权限（危险权限）

Question

如果设备在使用getLine1Number（）尝试获取电话号码时运行Android 6.0或更高版本：

java.lang.SecurityException：需要READ_PHONE_STATE：用户10184和当前进程都没有android.permission.READ_PHONE_STATE。这是出来的。

我宣布许可为：

<uses-permission android:name="android.permission.READ_PHONE_STATE" />

Answer 1

在Android 6.0中，您需要明确要求用户授予权限。仅仅在清单中声明它是不够的。

这篇文章中的article是开始学习新模型的好地方，但我将简要总结一下。

每次执行需要“危险权限”的操作时，都需要检查当前是否已授予权限，因为用户可以随时撤消该权限。

这可以使用checkSelfPermission方法完成。

if (ContextCompat.checkSelfPermission(thisActivity, Manifest.permission.READ_PHONE_STATE)
    != PackageManager.PERMISSION_GRANTED) {
        // We do not have this permission. Let's ask the user
}

您可以使用requestPermissions方法请求权限

ActivityCompat.requestPermissions(thisActivity, new String[]{Manifest.permission.READ_PHONE_STATE}, PERMISSION_READ_STATE);

其中PERMISSION_READ_STATE是您定义的常量整数，以便稍后检入回调方法。

然后，您将在活动中覆盖onRequestPermissionsResult，并查看是否已授予权限。如果是的话，你可以继续进行危险的行动。

@Override
public void onRequestPermissionsResult(int requestCode,
        String permissions[], int[] grantResults) {
    switch (requestCode) {
        case PERMISSION_READ_STATE: {
            if (grantResults.length > 0
                && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                // permission granted!
                // you may now do the action that requires this permission
            } else {
                // permission denied
            }
            return;
        }

    }
}

Answer 2

public class MainActivity extends AppCompatActivity {

    TextView textView;
    String device_unique_id,IMEI;


    private static final int MY_PERMISSIONS_REQUEST_READ_PHONE_STATE = 0;


   @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        textView = (TextView)findViewById(R.id.textView);
    }
    public void GetImei(View view)
    {



        loadIMEI();

    }

    public void loadIMEI() {
        // Check if the READ_PHONE_STATE permission is already available.
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE)
                != PackageManager.PERMISSION_GRANTED) {
            if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                    Manifest.permission.READ_PHONE_STATE)) {
//                get_imei_data();
            } else {
                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_PHONE_STATE},
                        MY_PERMISSIONS_REQUEST_READ_PHONE_STATE);
            }
        } else {

            TelephonyManager mngr = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
            IMEI = mngr.getDeviceId();
            device_unique_id = Settings.Secure.getString(this.getContentResolver(),
                    Settings.Secure.ANDROID_ID);
            textView.setText(device_unique_id+"----"+mngr.getDeviceId());
            // READ_PHONE_STATE permission is already been granted.
            Toast.makeText(this,"Alredy granted",Toast.LENGTH_SHORT).show();
        }
    }
       @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,@NonNull int[] grantResults) {

        if (requestCode == MY_PERMISSIONS_REQUEST_READ_PHONE_STATE) {

            if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

//                Toast.makeText(this,"Alredy DONE",Toast.LENGTH_SHORT).show();
                TelephonyManager mngr = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
                IMEI = mngr.getDeviceId();
                device_unique_id = Settings.Secure.getString(this.getContentResolver(),Settings.Secure.ANDROID_ID);
                textView.setText(device_unique_id+"----"+mngr.getDeviceId());

            } else {
                Toast.makeText(this,"ehgehfg",Toast.LENGTH_SHORT).show();
            }
        }
    }