java.lang.RuntimeException异常，请大神赐教！！！

2017-11-18 09:46:09 7.8k 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Android 相机开发 java.lang.RuntimeException: takePicture failed 今天在做开发的时候，调用 takePicture()时，导致 java.lang.RuntimeException: takePicture failed at android.hardware.Camera.native_takePicture(Native Method) at android.hardware.Camera.takePicture(Camera... 阅读详情

11-18 09:39:51.281 19604-19604/com.example.admin.emotion E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.admin.emotion, PID: 19604
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.admin.emotion/com.example.admin.emotion.MainFragment}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2793)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2864)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1567)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:156)
at android.app.ActivityThread.main(ActivityThread.java:6524)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setOnClickListener(android.view.View$OnClickListener)' on a null object reference
at com.example.admin.emotion.MainFragment.initView(MainFragment.java:80)
at com.example.admin.emotion.MainFragment.onCreate(MainFragment.java:59)
at android.app.Activity.performCreate(Activity.java:6910)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2746)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2864)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1567)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:156)
at android.app.ActivityThread.main(ActivityThread.java:6524)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)
出问题的代码：
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.content_main);
fragmentManager = getSupportFragmentManager();
initView();
setChioceItem(0);
}

private void initView() {
firstImage = (ImageView) findViewById(R.id.first_image);
secondImage = (ImageView) findViewById(R.id.second_image);
thirdImage = (ImageView) findViewById(R.id.third_image);
fourthImage = (ImageView) findViewById(R.id.fourth_image);
firstText = (TextView) findViewById(R.id.first_text);
secondText = (TextView) findViewById(R.id.second_text);
thirdText = (TextView) findViewById(R.id.third_text);
fourthText = (TextView) findViewById(R.id.fourth_text);
firstLayout = (RelativeLayout) findViewById(R.id.first_layout);
secondLayout = (RelativeLayout) findViewById(R.id.second_layout);
thirdLayout = (RelativeLayout) findViewById(R.id.third_layout);
fourthLayout = (RelativeLayout) findViewById(R.id.fourth_layout);

firstLayout.setOnClickListener(MainFragment.this);
secondLayout.setOnClickListener(MainFragment.this);
thirdLayout.setOnClickListener(MainFragment.this);
fourthLayout.setOnClickListener(MainFragment.this);
}

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