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如何在认证成功后完成活动

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Pedro · 技术社区 · 6 年前

我正在尝试在FingerAuthentification成功后完成登录活动,我尝试使用“Finish()”和“FinishAffinity()”,但我得到一个错误“cannot resolver method finish()or finishAffinity()”

@TargetApi(Build.VERSION_CODES.M)
public class FingerprintHandler extends FingerprintManager.AuthenticationCallback {

    private CancellationSignal cancellationSignal;
    private Context context;

    public FingerprintHandler(Context mcontext) { context = mcontext; }

    public void startAuth(FingerprintManager manager, FingerprintManager.CryptoObject cryptoObject) {
        cancellationSignal = new CancellationSignal();
        if (ActivityCompat.checkSelfPermission(context, Manifest.permission.USE_FINGERPRINT) != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        manager.authenticate(cryptoObject, cancellationSignal, 0, this, null);
    }

    @Override
    public void onAuthenticationError(int errMsgId, CharSequence errString) {
        Toast.makeText(context,"Authentication error\n" + errString, Toast.LENGTH_LONG).show();
    }

    @Override
    public void onAuthenticationFailed() {
        Toast.makeText(context, "Authentication failed", Toast.LENGTH_LONG).show();
    }

    public void onAuthenticationHelp(int helpMsgId, CharSequence helpString) {
        Toast.makeText(context, "Authentication help\n" + helpString, Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onAuthenticationSucceeded(FingerprintManager.AuthenticationResult result) {
        Toast.makeText(context, "Authentication Success!!", Toast.LENGTH_SHORT).show();
        Handler hd = new Handler();
        hd.postDelayed(new Runnable() {
            @Override
            public void run() {
                context.startActivity(new Intent(context, MainActivity.class));
                FingerLogin.finish();
            }
        }, 2000);
    }
}

3 回复 | 直到 6 年前

Susmit Agrawal Sudip Bolakhe 6 年前

我以前没有尝试过,但理论上这应该是可行的:

步骤1:在构造函数中传递 Activity 而不是 Context . 这是要完成的活动。

步骤2:将此活动分配给一个私有变量。

第3步:呼叫 finish() 在需要时打开变量。

代码如下:

public class FingerprintHandler extends FingerprintManager.AuthenticationCallback {

    private CancellationSignal cancellationSignal;
    private Activity activity;

    public FingerprintHandler(Activity mActivity) { activity = mActivity; }

    .....

    @Override
    public void onAuthenticationSucceeded(FingerprintManager.AuthenticationResult result) {
    Toast.makeText(activity.getApplicationContext(), "Authentication Success!!", Toast.LENGTH_SHORT).show();
    Handler hd = new Handler();
    hd.postDelayed(new Runnable() {
        @Override
        public void run() {
            activity.startActivity(new Intent(context, MainActivity.class));
            activity.finish();
        }
    }, 2000);

Jeffrey Blattman 6 年前

finish() 是上的方法 Activity 不是 Context . 你无法完成上下文。不清楚您是否在活动的上下文中运行。如果是,打电话 完成() 你自己(或 YourActivity.this.finish() )

MRah 6 年前

使用此选项可以访问活动的重写方法:

           if(context instanceof FingerLogin){
                   ((FingerLogin)context).finish();
           }