https://github.com/yabushi/TimeStampCamera
The part I wrote myself ↓
https://github.com/yabushi/TimeStampCamera/blob/4b4c441675a6a5e7d6b2cf1f0448e19b1a115fd7/app/src/main/java/com/example/shigeki/timestampcamera/MainActivity.java
When I try to run a program in , I see "Exit TimeStampCamera because there is a problem with my Android device", and I get the following error:
I thought there might be a problem with characteristics.get(CameraCharacteristics.LENS_FACING) in line 72, but I don't know how to solve it.
Thank you for your cooperation.
E/AndroidRuntime:FATAL EXCEPTION:main
Process: com.example.shigeki.timestampcamera, PID:867
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo {com.example.shigeki.timestampcamera/com.example.shigeki.timestampcamera.MainActivity}:java.lang.NullPointerException:Attempt to invoice virtual.video.video$view
at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2366)
at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2517)
at android.app.ActivityThread.access$800 (ActivityThread.java:162)
at android.app.ActivityThread$H.handleMessage (ActivityThread.java:1412)
at android.os.Handler.dispatchMessage (Handler.java:106)
at android.os.Looper.loop (Looper.java:189)
at android.app.ActivityThread.main (ActivityThread.java:5529)
at java.lang.reflect.Method.invoke (Native Method)
at java.lang.reflect.Method.invoke (Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:950)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java: 745)
Caused by: java.lang.NullPointerException: Attempt to Invoke virtual method' android.view.Window$Callback android.view.Window.getCallback()'on a null object reference
at android.support.v7.app.AppCompatDelegateImplBase.<init> (AppCompatDelegateImplBase.java:117)
at android.support.v7.app.AppCompatDelegateImplV9.<init> (AppCompatDelegateImplV9.java:149)
at android.support.v7.app.AppCompatDelegateImplV14.<init> (AppCompatDelegateImplV14.java:56)
at android.support.v7.app.AppCompatDelegate.create (AppCompatDelegate.java:202)
at android.support.v7.app.AppCompatDelegate.create (AppCompatDelegate.java:183)
at android.support.v7.app.AppCompatActivity.getDelegate (AppCompatActivity.java:519)
at android.support.v7.app.AppCompatActivity.findViewById (AppCompatActivity.java:190)
at com.example.shigeki.timestampcamera.MainActivity.<init> (MainActivity.java:46)
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.Class.newInstance (Class.java:1572)
at android.app.instrumentation.newActivity (instrumentation.java:1065)
at android.app.ActivityThread.performLaunchActivity (ActivityThread.java:2356)
at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:2517)
at android.app.ActivityThread.access$800 (ActivityThread.java:162)
at android.app.ActivityThread$H.handleMessage (ActivityThread.java:1412)
at android.os.Handler.dispatchMessage (Handler.java:106)
at android.os.Looper.loop (Looper.java:189)
at android.app.ActivityThread.main (ActivityThread.java:5529)
at java.lang.reflect.Method.invoke (Native Method)
at java.lang.reflect.Method.invoke (Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:950)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java: 745)
This is the original program.
public class MainActivity extends AppCompatActivity {
// // // // // // // // // // // // // // // // // // // // // // // // // // // // // // // // // // // // // / fields // // // //
Camera by a variable for instance, for example, Device /
CameraDevice mCameraDevice;
Cameron / Capital Ventures SessionBean1 maxTripRowSet variables
CameraCaptureSession mCaptureSession = null;
/ / Capture Request for variable
CaptureRequest mPreviewRequest = null;
private CaptureRequest.Builder mPreviewRequestBuilder;
Texas ’ view set on a screen / View
final TextureView mTextureView = findViewById(R.id.textureview);
When a shutter button /
final Button ShutterButton = findViewById(R.id.shutter);
//////////////////////////////////////////////////////////////////////////////////////////
@SuppressLint("MissingPermission")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Changing the definition location of mTextureView and ShutterButton as shown below resolved the issue.
public class MainActivity extends AppCompatActivity {
// // // // // // // // // // // // // // // // // // // // // // // // // // // // // // // // // // // // // / fields // // // //
Camera by a variable for instance, for example, Device /
CameraDevice mCameraDevice;
Cameron / Capital Ventures SessionBean1 maxTripRowSet variables
CameraCaptureSession mCaptureSession = null;
/ / Capture Request for variable
CaptureRequest mPreviewRequest = null;
private CaptureRequest.Builder mPreviewRequestBuilder;
//////////////////////////////////////////////////////////////////////////////////////////
@SuppressLint("MissingPermission")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Texas ’ view set on a screen / View
final TextureView mTextureView = findViewById(R.id.textureview);
When a shutter button /
final Button ShutterButton = findViewById(R.id.shutter);
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