運行時權限

運行時權限，
權限列表

private String[] REQUIRED_PERMISSIONS = {Manifest.permission.CAMERA};

檢查權限在onCreate裏調用

public boolean checkPermission(){
        for (String permission:REQUIRED_PERMISSIONS){
            if (ContextCompat.checkSelfPermission(getApplicationContext(),permission) != PackageManager.PERMISSION_GRANTED){
                return false;
            }
        }
        return true;
    }

請求權限

 ActivityCompat.requestPermissions(this, REQUIRED_PERMISSIONS, REQUEST_CODE_PERMISSIONS);

在onRequestPermissionsResult 再次檢查權限，沒有權限直接退出

@Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        Log.d("mile","onRequestPermissionsResult");
        if (!checkPermission()){
            finish();
        }

全部代碼

 

public class MainActivity extends AppCompatActivity implements LifecycleOwner {

    private static int REQUEST_CODE_PERMISSIONS = 10;
    private String[] REQUIRED_PERMISSIONS = {Manifest.permission.CAMERA};
    private TextureView viewFinder;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        viewFinder = findViewById(R.id.view_finder);
        if (!checkPermission()){
            ActivityCompat.requestPermissions(this, REQUIRED_PERMISSIONS, REQUEST_CODE_PERMISSIONS);
        }
    }

    @Override
    public Lifecycle getLifecycle() {
        return super.getLifecycle();
    }


    public boolean checkPermission(){
        for (String permission:REQUIRED_PERMISSIONS){
            if (ContextCompat.checkSelfPermission(getApplicationContext(),permission) != PackageManager.PERMISSION_GRANTED){
                return false;
            }
        }
        return true;
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        Log.d("mile","onActivityResult");
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        Log.d("mile","onRequestPermissionsResult");
        if (!checkPermission()){
            finish();
        }
    }

}