这是我的主要活动，这是相机过滤器的代码。我没有弄明白任何错误。但是当我运行这段代码时，它会在我的真实设备中崩溃。请在此处提供任何帮助，请问错误在哪里以及错误属于什么。我将日志cat错误附加为pic。请找到它
public class MainActivity extends AppCompatActivity {
private static final int REQUEST_CAMERA_PERSIMMISON = 101;
private CameraRenderer renderer;
private TextureView textureView;
private int filterId = R.id.filter0;
/**
* ATTENTION: This was auto-generated to implement the App Indexing API.
* See https://g.co/AppIndexing/AndroidStudio for more information.
*/
private GoogleApiClient client;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setTitle("Original");
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager
.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)) {
Toast.makeText(this, "Camera acess is required.", Toast.LENGTH_SHORT).show();
} else {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, REQUEST_CAMERA_PERSIMMISON);
}
} else {
setupCameraPreviewView();
}
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
}
void setupCameraPreviewView() {
renderer = new CameraRenderer(this);
textureView = (TextureView) findViewById(R.id.textureView);
assert textureView != null;
textureView.setSurfaceTextureListener(renderer);
textureView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
renderer.setSelectedFilter(R.id.filter0);
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
renderer.setSelectedFilter(filterId);
break;
}
return true;
}
});
textureView.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
@Override
public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
renderer.onSurfaceTextureSizeChanged(null, v.getWidth(), v.getHeight());
}
});
}
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.filter, menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
filterId = item.getItemId();
if (filterId == R.id.capture) {
Toast.makeText(this, capture() ? "The capture has been saved to your sdcard root path." : "Saved failed", Toast.LENGTH_SHORT).show();
return true;
}
setTitle(item.getTitle());
if (renderer != null)
renderer.setSelectedFilter(filterId);
return true;
}
private boolean capture() {
String mPath = genSaveFileName(getTitle().toString() + "_", ".png");
File imageFile = new File(mPath);
if (imageFile.exists()) {
imageFile.delete();
}
Bitmap bitmap = textureView.getBitmap();
OutputStream outputStream = null;
try {
outputStream = new FileOutputStream(imageFile);
bitmap.compress(Bitmap.CompressFormat.PNG, 90, outputStream);
outputStream.flush();
outputStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
return false;
} catch (IOException e) {
e.printStackTrace();
return false;
}
return true;
}
private String genSaveFileName(String prefix, String suffix) {
Date date = new Date();
SimpleDateFormat dateFormat1 = new SimpleDateFormat("yyyyMMdd_hhmmss");
String timeString = dateFormat1.format(date);
String externalPath = Environment.getExternalStorageDirectory().toString();
return externalPath + "/" + prefix + timeString + suffix;
}
@Override
public void onStart() {
super.onStart();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client.connect();
Action viewAction = Action.newAction(
Action.TYPE_VIEW, // TODO: choose an action type.
"Main Page", // TODO: Define a title for the content shown.
// TODO: If you have web page content that matches this app activity's content,
// make sure this auto-generated web page URL is correct.
// Otherwise, set the URL to null.
Uri.parse("http://host/path"),
// TODO: Make sure this auto-generated app URL is correct.
Uri.parse("android-app://giri.com.camerafilter/http/host/path")
);
AppIndex.AppIndexApi.start(client, viewAction);
}
@Override
public void onStop() {
super.onStop();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
Action viewAction = Action.newAction(
Action.TYPE_VIEW, // TODO: choose an action type.
"Main Page", // TODO: Define a title for the content shown.
// TODO: If you have web page content that matches this app activity's content,
// make sure this auto-generated web page URL is correct.
// Otherwise, set the URL to null.
Uri.parse("http://host/path"),
// TODO: Make sure this auto-generated app URL is correct.
Uri.parse("android-app://giri.com.camerafilter/http/host/path")
);
AppIndex.AppIndexApi.end(client, viewAction);
client.disconnect();
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<TextView
android:id="@+id/textureView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</RelativeLayout>
这是我的CameraRenderer.java
public class CameraRenderer extends Thread implements TextureView.SurfaceTextureListener {
private static final String TAG = "CameraRenderer";
private static final int EGL_OPENGL_ES2_BIT = 4;
private static final int EGL_CONTEXT_CLIENT_VERSION = 0x3098;
private static final int DRAW_INTERVAL = 1000 / 30;
private Context context;
private SurfaceTexture surfaceTexture;
private int gwidth, gheight;
private EGLDisplay eglDisplay;
private EGLSurface eglSurface;
private EGLContext eglContext;
private EGL10 egl10;
private Camera camera;
private SurfaceTexture cameraSurfaceTexture;
private int cameraTextureId;
private CameraFilter selectedFilter;
private SparseArray<CameraFilter> cameraFilterMap = new SparseArray<>();
public CameraRenderer(Context context) {
this.context = context;
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
GLES20.glViewport(0, 0, gwidth = width, gheight = height);
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
if (camera != null) {
camera.stopPreview();
camera.release();
}
interrupt();
CameraFilter.release();
return true;
}
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
if (isAlive()) {
interrupt();
}
surfaceTexture = surface;
GLES20.glViewport(0, 0, gwidth = width, gheight = height);
// Open camera
Pair<Camera.CameraInfo, Integer> backCamera = getBackCamera();
final int backCameraId = backCamera.second;
camera = Camera.open(backCameraId);
// Start rendering
start();
}
public void setSelectedFilter(int id) {
selectedFilter = cameraFilterMap.get(id);
selectedFilter.onAttach();
}
@Override
public void run() {
initGL(surfaceTexture);
// Setup camera filters map
cameraFilterMap.append(R.id.filter0, new OriginalFilter(context));
cameraFilterMap.append(R.id.filter1, new EdgeDetectionFilter(context));
cameraFilterMap.append(R.id.filter2, new PixelizeFilter(context));
cameraFilterMap.append(R.id.filter3, new EMInterferenceFilter(context));
cameraFilterMap.append(R.id.filter4, new TrianglesMosaicFilter(context));
cameraFilterMap.append(R.id.filter5, new LegofiedFilter(context));
cameraFilterMap.append(R.id.filter6, new TileMosaicFilter(context));
cameraFilterMap.append(R.id.filter7, new BlueorangeFilter(context));
cameraFilterMap.append(R.id.filter8, new ChromaticAberrationFilter(context));
cameraFilterMap.append(R.id.filter9, new BasicDeformFilter(context));
cameraFilterMap.append(R.id.filter10, new ContrastFilter(context));
cameraFilterMap.append(R.id.filter11, new NoiseWarpFilter(context));
cameraFilterMap.append(R.id.filter12, new RefractionFilter(context));
cameraFilterMap.append(R.id.filter13, new MappingFilter(context));
cameraFilterMap.append(R.id.filter14, new CrosshatchFilter(context));
cameraFilterMap.append(R.id.filter15, new LichtensteinEsqueFilter(context));
cameraFilterMap.append(R.id.filter16, new AsciiArtFilter(context));
cameraFilterMap.append(R.id.filter17, new MoneyFilter(context));
cameraFilterMap.append(R.id.filter18, new CrackedFilter(context));
cameraFilterMap.append(R.id.filter19, new PolygonizationFilter(context));
cameraFilterMap.append(R.id.filter20, new JFAVoronoiFilter(context));
setSelectedFilter(R.id.filter0);
// Create texture for camera preview
cameraTextureId = MyGLUtils.genTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES);
cameraSurfaceTexture = new SurfaceTexture(cameraTextureId);
// Start camera preview
try {
camera.setPreviewTexture(cameraSurfaceTexture);
camera.startPreview();
} catch (IOException ioe) {
// Something bad happened
}
// Render loop
while (!Thread.currentThread().isInterrupted()) {
try {
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
// Update the camera preview texture
synchronized (this) {
cameraSurfaceTexture.updateTexImage();
}
// Draw camera preview
selectedFilter.draw(cameraTextureId, gwidth, gheight);
// Flush
GLES20.glFlush();
egl10.eglSwapBuffers(eglDisplay, eglSurface);
Thread.sleep(DRAW_INTERVAL);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
cameraSurfaceTexture.release();
GLES20.glDeleteTextures(1, new int[]{cameraTextureId}, 0);
}
private void initGL(SurfaceTexture texture) {
egl10 = (EGL10) EGLContext.getEGL();
eglDisplay = egl10.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
if (eglDisplay == EGL10.EGL_NO_DISPLAY) {
throw new RuntimeException("eglGetDisplay failed " + android.opengl.GLUtils.getEGLErrorString(egl10.eglGetError()));
}
int[] version = new int[2];
if (!egl10.eglInitialize(eglDisplay, version)) {
throw new RuntimeException("eglInitialize failed " + android.opengl.GLUtils.getEGLErrorString(egl10.eglGetError()));
}
int[] configsCount = new int[1];
EGLConfig[] configs = new EGLConfig[1];
int[] configSpec = {
EGL10.EGL_RENDERABLE_TYPE,
EGL_OPENGL_ES2_BIT,
EGL10.EGL_RED_SIZE, 8,
EGL10.EGL_GREEN_SIZE, 8,
EGL10.EGL_BLUE_SIZE, 8,
EGL10.EGL_ALPHA_SIZE, 8,
EGL10.EGL_DEPTH_SIZE, 0,
EGL10.EGL_STENCIL_SIZE, 0,
EGL10.EGL_NONE
};
EGLConfig eglConfig = null;
if (!egl10.eglChooseConfig(eglDisplay, configSpec, configs, 1, configsCount)) {
throw new IllegalArgumentException("eglChooseConfig failed " + android.opengl.GLUtils.getEGLErrorString(egl10.eglGetError()));
} else if (configsCount[0] > 0) {
eglConfig = configs[0];
}
if (eglConfig == null) {
throw new RuntimeException("eglConfig not initialized");
}
int[] attrib_list = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL10.EGL_NONE};
eglContext = egl10.eglCreateContext(eglDisplay, eglConfig, EGL10.EGL_NO_CONTEXT, attrib_list);
eglSurface = egl10.eglCreateWindowSurface(eglDisplay, eglConfig, texture, null);
if (eglSurface == null || eglSurface == EGL10.EGL_NO_SURFACE) {
int error = egl10.eglGetError();
if (error == EGL10.EGL_BAD_NATIVE_WINDOW) {
Log.e(TAG, "eglCreateWindowSurface returned EGL10.EGL_BAD_NATIVE_WINDOW");
return;
}
throw new RuntimeException("eglCreateWindowSurface failed " + android.opengl.GLUtils.getEGLErrorString(error));
}
if (!egl10.eglMakeCurrent(eglDisplay, eglSurface, eglSurface, eglContext)) {
throw new RuntimeException("eglMakeCurrent failed " + android.opengl.GLUtils.getEGLErrorString(egl10.eglGetError()));
}
}
private Pair<Camera.CameraInfo, Integer> getBackCamera() {
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
final int numberOfCameras = Camera.getNumberOfCameras();
for (int i = 0; i < numberOfCameras; ++i) {
Camera.getCameraInfo(i, cameraInfo);
if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
return new Pair<>(cameraInfo, i);
}
}
return null;
}
}
**This is my CameraFilter.java file**
public abstract class CameraFilter {
static final float SQUARE_COORDS[] = {
1.0f, -1.0f,
-1.0f, -1.0f,
1.0f, 1.0f,
-1.0f, 1.0f,
};
static final float TEXTURE_COORDS[] = {
1.0f, 0.0f,
0.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f,
};
static FloatBuffer VERTEX_BUF, TEXTURE_COORD_BUF;
static int PROGRAM = 0;
private static final int BUF_ACTIVE_TEX_UNIT = GLES20.GL_TEXTURE8;
private static RenderBuffer CAMERA_RENDER_BUF;
private static final float ROATED_TEXTURE_COORDS[] = {
1.0f, 0.0f,
1.0f, 1.0f,
0.0f, 0.0f,
0.0f, 1.0f,
};
private static FloatBuffer ROATED_TEXTURE_COORD_BUF;
final long START_TIME = System.currentTimeMillis();
int iFrame = 0;
public CameraFilter(Context context) {
// Setup default Buffers
if (VERTEX_BUF == null) {
VERTEX_BUF = ByteBuffer.allocateDirect(SQUARE_COORDS.length * 4)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
VERTEX_BUF.put(SQUARE_COORDS);
VERTEX_BUF.position(0);
}
if (TEXTURE_COORD_BUF == null) {
TEXTURE_COORD_BUF = ByteBuffer.allocateDirect(TEXTURE_COORDS.length * 4)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
TEXTURE_COORD_BUF.put(TEXTURE_COORDS);
TEXTURE_COORD_BUF.position(0);
}
if (ROATED_TEXTURE_COORD_BUF == null) {
ROATED_TEXTURE_COORD_BUF = ByteBuffer.allocateDirect(ROATED_TEXTURE_COORDS.length * 4)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
ROATED_TEXTURE_COORD_BUF.put(ROATED_TEXTURE_COORDS);
ROATED_TEXTURE_COORD_BUF.position(0);
}
if (PROGRAM == 0) {
PROGRAM = MyGLUtils.buildProgram(context, R.raw.vertext, R.raw.original_rtt);
}
}
@CallSuper
public void onAttach() {
iFrame = 0;
}
final public void draw(int cameraTexId, int canvasWidth, int canvasHeight) {
// TODO move?
// Create camera render buffer
if (CAMERA_RENDER_BUF == null ||
CAMERA_RENDER_BUF.getWidth() != canvasWidth ||
CAMERA_RENDER_BUF.getHeight() != canvasHeight) {
CAMERA_RENDER_BUF = new RenderBuffer(canvasWidth, canvasHeight, BUF_ACTIVE_TEX_UNIT);
}
// Use shaders
GLES20.glUseProgram(PROGRAM);
int iChannel0Location = GLES20.glGetUniformLocation(PROGRAM, "iChannel0");
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, cameraTexId);
GLES20.glUniform1i(iChannel0Location, 0);
int vPositionLocation = GLES20.glGetAttribLocation(PROGRAM, "vPosition");
GLES20.glEnableVertexAttribArray(vPositionLocation);
GLES20.glVertexAttribPointer(vPositionLocation, 2, GLES20.GL_FLOAT, false, 4 * 2, VERTEX_BUF);
int vTexCoordLocation = GLES20.glGetAttribLocation(PROGRAM, "vTexCoord");
GLES20.glEnableVertexAttribArray(vTexCoordLocation);
GLES20.glVertexAttribPointer(vTexCoordLocation, 2, GLES20.GL_FLOAT, false, 4 * 2, ROATED_TEXTURE_COORD_BUF);
// Render to texture
CAMERA_RENDER_BUF.bind();
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
CAMERA_RENDER_BUF.unbind();
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
onDraw(CAMERA_RENDER_BUF.getTexId(), canvasWidth, canvasHeight);
iFrame ++;
}
abstract void onDraw(int cameraTexId, int canvasWidth, int canvasHeight);
void setupShaderInputs(int program, int[] iResolution, int[] iChannels, int[][] iChannelResolutions) {
setupShaderInputs(program, VERTEX_BUF, TEXTURE_COORD_BUF, iResolution, iChannels, iChannelResolutions);
}
void setupShaderInputs(int program, FloatBuffer vertex, FloatBuffer textureCoord, int[] iResolution, int[] iChannels, int[][] iChannelResolutions) {
GLES20.glUseProgram(program);
int iResolutionLocation = GLES20.glGetUniformLocation(program, "iResolution");
GLES20.glUniform3fv(iResolutionLocation, 1,
FloatBuffer.wrap(new float[]{(float) iResolution[0], (float) iResolution[1], 1.0f}));
float time = ((float) (System.currentTimeMillis() - START_TIME)) / 1000.0f;
int iGlobalTimeLocation = GLES20.glGetUniformLocation(program, "iGlobalTime");
GLES20.glUniform1f(iGlobalTimeLocation, time);
int iFrameLocation = GLES20.glGetUniformLocation(program, "iFrame");
GLES20.glUniform1i(iFrameLocation, iFrame);
int vPositionLocation = GLES20.glGetAttribLocation(program, "vPosition");
GLES20.glEnableVertexAttribArray(vPositionLocation);
GLES20.glVertexAttribPointer(vPositionLocation, 2, GLES20.GL_FLOAT, false, 4 * 2, vertex);
int vTexCoordLocation = GLES20.glGetAttribLocation(program, "vTexCoord");
GLES20.glEnableVertexAttribArray(vTexCoordLocation);
GLES20.glVertexAttribPointer(vTexCoordLocation, 2, GLES20.GL_FLOAT, false, 4 * 2, textureCoord);
for (int i = 0; i < iChannels.length; i ++) {
int sTextureLocation = GLES20.glGetUniformLocation(program, "iChannel" + i);
GLES20.glActiveTexture(GLES20.GL_TEXTURE0 + i);
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, iChannels[i]);
GLES20.glUniform1i(sTextureLocation, i);
}
float _iChannelResolutions[] = new float[iChannelResolutions.length * 3];
for (int i = 0; i < iChannelResolutions.length; i++) {
_iChannelResolutions[i*3] = iChannelResolutions[i][0];
_iChannelResolutions[i*3 + 1] = iChannelResolutions[i][1];
_iChannelResolutions[i*3 + 2] = 1.0f;
}
int iChannelResolutionLocation = GLES20.glGetUniformLocation(program, "iChannelResolution");
GLES20.glUniform3fv(iChannelResolutionLocation,
_iChannelResolutions.length, FloatBuffer.wrap(_iChannelResolutions));
}
public static void release() {
PROGRAM = 0;
CAMERA_RENDER_BUF = null;
}
}
仍然出现错误
E/AndroidRuntime: FATAL EXCEPTION: Thread-1759 Process: giri.com.camerafilter, PID: 21244
java.lang.NullPointerException: Attempt to invoke virtual method 'void giri.com.camerafilter.RenderBuffer.unbind()' on a null object reference
at giri.com.camerafilter.filter.CameraFilter.draw(CameraFilter.java:126)
at giri.com.camerafilter.CameraRenderer.run(CameraRenderer.java:165)
答案 0 :(得分：0)
有classCastException表示您casting一个class与另一个class签名不同的AppCompatTextview。您在xml中使用了TextView，并且正在将其转换为AppCompatTextView textView = (TextView) findViewById(R.id.your_id);
你可能正在这样做
AppCompatTextView textView = (AppCompatTextView) findViewById(R.id.your_id);
你应该做如下
wk答案 1 :(得分：0)
您收到ClassCastException，因为您试图将TextView投放到TextureView。更改：
<TextView
android:id="@+id/textureView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
到<TextureView...>：
<TextureView
android:id="@+id/textureView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>