Question

我尝试使用指纹创建一个简单的应用程序，但每次尝试运行它都会停止工作。

你能帮我找到我想念的东西，因为我是android studio的新手并且似乎无法知道这个问题而且我搜索了很多东西但到目前为止还没有找到这是错误

E / AndroidRuntime：致命异常：主要           处理：com.example.mohamed_pc.fingerprint，PID：5215               java.lang.RuntimeException：无法启动活动ComponentInfo {com.example.mohamed_pc.fingerprint / com.example.mohamed_pc.fingerprint.FingerPrintactivity}：android.view.InflateException：二进制XML文件行＃0：二进制XML文件行＃0 ：错误膨胀类ImageView
          在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2416）
          ...
          引起：android.view.InflateException：二进制XML文件行＃0：二进制XML文件行＃0：错误膨胀类ImageView
          ...
          引起：android.view.InflateException：二进制XML文件行＃0：错误膨胀类ImageView
          ...
          引起：android.content.res.Resources $ NotFoundException：资源ID＃0x7f060054
          ......

这里是我的.xml

<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.mohamed_pc.fingerprint.FingerPrintactivity">

<ImageView
    android:id="@+id/imageView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="176dp"
    android:layout_marginStart="112dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:srcCompat="@drawable/finger" 
android:contentDescription="@string/todo" />

<TextView
    android:id="@+id/textView"
    android:layout_width="161dp"
    android:layout_height="29dp"
    android:layout_marginBottom="108dp"
    android:text="@string/touch_sensor"
    android:textAlignment="center"
    android:textSize="24sp"
    android:textStyle="bold"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintHorizontal_bias="0.457"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent" />

</android.support.constraint.ConstraintLayout>

那是我的主要课程

   class FingerPrintactivity extends AppCompatActivity {
    private static final String KEY_NAME = "example_key";
    private FingerprintManager fingerprintManager;
    private KeyguardManager keyguardManager;
    private KeyStore keyStore;
    private KeyGenerator keyGenerator;
    private Cipher cipher;
    private FingerprintManager.CryptoObject cryptoObject;
    protected void generateKey() {
        try {
            keyStore = KeyStore.getInstance("AndroidKeyStore");
        } catch (Exception e) {
            e.printStackTrace();
        }

        try {
            keyGenerator = KeyGenerator.getInstance(
                    KeyProperties.KEY_ALGORITHM_AES,
                    "AndroidKeyStore");
        } catch (NoSuchAlgorithmException |
                NoSuchProviderException e) {
            throw new RuntimeException(
                    "Failed to get KeyGenerator instance", e);
        }

        try {
            keyStore.load(null);
            keyGenerator.init(new
                    KeyGenParameterSpec.Builder(KEY_NAME,
                    KeyProperties.PURPOSE_ENCRYPT |
                            KeyProperties.PURPOSE_DECRYPT)
                    .setBlockModes(KeyProperties.BLOCK_MODE_CBC)
                    .setUserAuthenticationRequired(true)
                    .setEncryptionPaddings(
                            KeyProperties.ENCRYPTION_PADDING_PKCS7)
                    .build());
            keyGenerator.generateKey();
        } catch (NoSuchAlgorithmException |
                InvalidAlgorithmParameterException
                | CertificateException | IOException e) {
            throw new RuntimeException(e);
        }
    }
    public boolean cipherInit() {
        try {
            cipher = Cipher.getInstance(
                    KeyProperties.KEY_ALGORITHM_AES + "/"
                            + KeyProperties.BLOCK_MODE_CBC + "/"
                            + KeyProperties.ENCRYPTION_PADDING_PKCS7);
        } catch (NoSuchAlgorithmException |
                NoSuchPaddingException e) {
            throw new RuntimeException("Failed to get Cipher", e);
        }

        try {
            keyStore.load(null);
            SecretKey key = (SecretKey) keyStore.getKey(KEY_NAME,
                    null);
            cipher.init(Cipher.ENCRYPT_MODE, key);
            return true;
        } catch (KeyPermanentlyInvalidatedException e) {
            return false;
        } catch (KeyStoreException | CertificateException
                | UnrecoverableKeyException | IOException
                | NoSuchAlgorithmException | InvalidKeyException e) {
            throw new RuntimeException("Failed to init Cipher", e);
        }
    }



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_fingerprint);
        AppCompatDelegate.setCompatVectorFromResourcesEnabled(true);
        if (!fingerprintManager.hasEnrolledFingerprints()) {

            // This happens when no fingerprints are registered.
            Toast.makeText(this,
                    "Register at least one fingerprint in Settings",
                    Toast.LENGTH_LONG).show();
            return;
        }

        generateKey();

        if (cipherInit()) {
            cryptoObject =
                    new FingerprintManager.CryptoObject(cipher);
        }

        keyguardManager =
                (KeyguardManager) getSystemService(KEYGUARD_SERVICE);
        fingerprintManager =
                (FingerprintManager) getSystemService(FINGERPRINT_SERVICE);

        if (!keyguardManager.isKeyguardSecure()) {

            Toast.makeText(this,
                    "Lock screen security not enabled in Settings",
                    Toast.LENGTH_LONG).show();
            return;
        }

        if (ActivityCompat.checkSelfPermission(this,
                Manifest.permission.USE_FINGERPRINT) !=
                PackageManager.PERMISSION_GRANTED) {
            Toast.makeText(this,
                    "Fingerprint authentication permission not enabled",
                    Toast.LENGTH_LONG).show();

            return;
        }

        if (!fingerprintManager.hasEnrolledFingerprints()) {

            // This happens when no fingerprints are registered.
            Toast.makeText(this,
                    "Register at least one fingerprint in Settings",
                    Toast.LENGTH_LONG).show();
            return;
        }
        if (cipherInit()) {
            cryptoObject = new FingerprintManager.CryptoObject(cipher);

            FingerprintHandler helper = new FingerprintHandler(this);
            helper.startAuth(fingerprintManager, cryptoObject);
        }
    }



    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement


        return super.onOptionsItemSelected(item);
    }
}

这是一个从主

延伸出来的类

    public class FingerprintHandler extends
        FingerprintManager.AuthenticationCallback {

    private CancellationSignal cancellationSignal;
    private Context appContext;

    public FingerprintHandler(Context context) {
        appContext = context;
    }
    public void startAuth(FingerprintManager manager, FingerprintManager.CryptoObject cryptoObject) {

        cancellationSignal = new CancellationSignal();

        if (ActivityCompat.checkSelfPermission(appContext,
                Manifest.permission.USE_FINGERPRINT) !=
                PackageManager.PERMISSION_GRANTED) {
            return;
        }
        manager.authenticate(cryptoObject, cancellationSignal, 0, this, null);
    }
    public void onAuthenticationError(int errMsgId,
                                      CharSequence errString) {
        Toast.makeText(appContext,
                "Authentication error\n" + errString,
                Toast.LENGTH_LONG).show();
    }

    @Override
    public void onAuthenticationHelp(int helpMsgId,
                                     CharSequence helpString) {
        Toast.makeText(appContext,
                "Authentication help\n" + helpString,
                Toast.LENGTH_LONG).show();
    }

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

    @Override
    public void onAuthenticationSucceeded(
            FingerprintManager.AuthenticationResult result) {

        Toast.makeText(appContext,
                "Authentication succeeded.",
                Toast.LENGTH_LONG).show();
    }
}

Answer 1

您的 drawable / finger 导致此错误。我建议您使用像 Glide / Universal Image Loader 这样的图像加载程序库来加载图像或降低图像分辨率。

当我尝试在android studio

1 个答案: