设置内容视图（）；在我的启动画面中出现错误 activity
setContentView(); giving error in my splash screen activity
您好Android开发人员，
我正在制作一个应用程序，其中 运行 的欢迎屏幕（作为应用程序功能仅在用户安装应用程序时出现一次），然后是包含我的应用程序徽标的启动画面，然后它继续应用我的 api 级别最低 17(jelly bean 4.1) 我的应用程序 运行s 完全稳定 在 android ver. 5.0+没有任何错误没有任何问题
但是当我尝试 运行 我的应用 android 版本时 4.1 甚至 4.4.2它给了我错误
setContentView(activity_splash_screen);
欢迎屏幕打开后它崩溃了我已经尝试在欢迎之后打开登录屏幕作为下一个意图而不是闪屏然后它也会给出与 setContentView(activity_login_screen); 相同的错误然后我尝试如果在 welcomeactivity 之后直接打开我的 mainactivity（跳过 splash 和 login 两者）然后它打开主页但没有导航抽屉并且没有工具栏名称只打开第一页
我的应用程序原始序列
运行s 在版本上。 5.0+
欢迎activity-->启动画面-->登录屏幕-->主界面activity-->完整应用程序
如果我打开启动画面欢迎后出现启动画面错误activity
09-11 00:20:54.072 1798-1798/com.example.pk.testing_app2 E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.pk.testing_app2, PID: 1798
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.pk.testing_app2/com.example.pk.testing_app2.SplashScreenActivity}: android.view.InflateException: Binary XML file line #14: Error inflating class <unknown>
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2339)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2391)
at android.app.ActivityThread.access0(ActivityThread.java:166)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1281)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5511)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #14: Error inflating class <unknown>
at android.view.LayoutInflater.createView(LayoutInflater.java:626)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:675)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:700)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:769)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:366)
at android.app.Activity.setContentView(Activity.java:2009)
at com.example.pk.testing_app2.SplashScreenActivity.onCreate(SplashScreenActivity.java:14)
at android.app.Activity.performCreate(Activity.java:5322)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2303)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2391)
at android.app.ActivityThread.access0(ActivityThread.java:166)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1281)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5511)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:600)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:675)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:700)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:769)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:366)
at android.app.Activity.setContentView(Activity.java:2009)
at com.example.pk.testing_app2.SplashScreenActivity.onCreate(SplashScreenActivity.java:14)
at android.app.Activity.performCreate(Activity.java:5322)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2303)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2391)
at android.app.ActivityThread.access0(ActivityThread.java:166)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1281)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5511)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.content.res.Resources$NotFoundException: File res/drawable/logo.xml from drawable resource ID #0x7f020060
at android.content.res.Resources.loadDrawable(Resources.java:3443)
at android.content.res.TypedArray.getDrawable(TypedArray.java:602)
at android.widget.ImageView.<init>(ImageView.java:133)
at android.widget.ImageView.<init>(ImageView.java:123)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:600)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:675)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:700)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:769)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:366)
at android.app.Activity.setContentView(Activity.java:2009)
at com.example.pk.testing_app2.SplashScreenActivity.onCreate(SplashScreenActivity.java:14)
at android.app.Activity.performCreate(Activity.java:5322)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2303)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2391)
at android.app.ActivityThread.access0(ActivityThread.java:166)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1281)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5511)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #1: invalid drawable tag vector
at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:986)
at android.graphics.drawable.Drawable.createFromXml(Drawable.java:930)
at android.content.res.Resources.loadDrawable(Resources.java:3439)
at android.content.res.TypedArray.getDrawable(TypedArray.java:602)
at android.widget.ImageView.<init>(ImageView.java:133)
at android.widget.ImageView.<init>(ImageView.java:123)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:600)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:675)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:700)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:769)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:366)
at android.app.Activity.setContentView(Activity.java:2009)
at com.example.pk.testing_app2.SplashScreenActivity.onCreate(SplashScreenActivity.java:14)
at android.app.Activity.performCreate(Activity.java:5322)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2303)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2391)
at android.app.ActivityThread.access0(ActivityThread.java:166)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1281)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5511)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
启动画面activity
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
public class SplashScreenActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash_screen);
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
startActivity(new Intent(SplashScreenActivity.this, LoginActivity.class));
}
}, 1500);
}
}
您在初始化工具栏后调用 setContentView(R.layout.activity_welcome);。这可能会给你 nullPointerExcaption.
所以最好的做法是在 super.onCreate(savedInstanceState); 之后写 setContentView(R.layout.activity_welcome);。
示例：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
// rest of the code..
}
您好Android开发人员，
我正在制作一个应用程序，其中 运行 的欢迎屏幕（作为应用程序功能仅在用户安装应用程序时出现一次），然后是包含我的应用程序徽标的启动画面，然后它继续应用我的 api 级别最低 17(jelly bean 4.1) 我的应用程序 运行s 完全稳定 在 android ver. 5.0+没有任何错误没有任何问题
但是当我尝试 运行 我的应用 android 版本时 4.1 甚至 4.4.2它给了我错误 setContentView(activity_splash_screen); 欢迎屏幕打开后它崩溃了我已经尝试在欢迎之后打开登录屏幕作为下一个意图而不是闪屏然后它也会给出与 setContentView(activity_login_screen); 相同的错误然后我尝试如果在 welcomeactivity 之后直接打开我的 mainactivity（跳过 splash 和 login 两者）然后它打开主页但没有导航抽屉并且没有工具栏名称只打开第一页
我的应用程序原始序列 运行s 在版本上。 5.0+
欢迎activity-->启动画面-->登录屏幕-->主界面activity-->完整应用程序
如果我打开启动画面欢迎后出现启动画面错误activity
09-11 00:20:54.072 1798-1798/com.example.pk.testing_app2 E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.pk.testing_app2, PID: 1798
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.pk.testing_app2/com.example.pk.testing_app2.SplashScreenActivity}: android.view.InflateException: Binary XML file line #14: Error inflating class <unknown>
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2339)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2391)
at android.app.ActivityThread.access0(ActivityThread.java:166)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1281)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5511)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #14: Error inflating class <unknown>
at android.view.LayoutInflater.createView(LayoutInflater.java:626)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:675)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:700)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:769)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:366)
at android.app.Activity.setContentView(Activity.java:2009)
at com.example.pk.testing_app2.SplashScreenActivity.onCreate(SplashScreenActivity.java:14)
at android.app.Activity.performCreate(Activity.java:5322)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2303)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2391)
at android.app.ActivityThread.access0(ActivityThread.java:166)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1281)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5511)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:600)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:675)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:700)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:769)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:366)
at android.app.Activity.setContentView(Activity.java:2009)
at com.example.pk.testing_app2.SplashScreenActivity.onCreate(SplashScreenActivity.java:14)
at android.app.Activity.performCreate(Activity.java:5322)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2303)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2391)
at android.app.ActivityThread.access0(ActivityThread.java:166)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1281)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5511)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.content.res.Resources$NotFoundException: File res/drawable/logo.xml from drawable resource ID #0x7f020060
at android.content.res.Resources.loadDrawable(Resources.java:3443)
at android.content.res.TypedArray.getDrawable(TypedArray.java:602)
at android.widget.ImageView.<init>(ImageView.java:133)
at android.widget.ImageView.<init>(ImageView.java:123)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:600)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:675)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:700)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:769)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:366)
at android.app.Activity.setContentView(Activity.java:2009)
at com.example.pk.testing_app2.SplashScreenActivity.onCreate(SplashScreenActivity.java:14)
at android.app.Activity.performCreate(Activity.java:5322)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2303)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2391)
at android.app.ActivityThread.access0(ActivityThread.java:166)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1281)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5511)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #1: invalid drawable tag vector
at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:986)
at android.graphics.drawable.Drawable.createFromXml(Drawable.java:930)
at android.content.res.Resources.loadDrawable(Resources.java:3439)
at android.content.res.TypedArray.getDrawable(TypedArray.java:602)
at android.widget.ImageView.<init>(ImageView.java:133)
at android.widget.ImageView.<init>(ImageView.java:123)
at java.lang.reflect.Constructor.constructNative(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at android.view.LayoutInflater.createView(LayoutInflater.java:600)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:56)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:675)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:700)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:769)
at android.view.LayoutInflater.inflate(LayoutInflater.java:498)
at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
at android.view.LayoutInflater.inflate(LayoutInflater.java:354)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:366)
at android.app.Activity.setContentView(Activity.java:2009)
at com.example.pk.testing_app2.SplashScreenActivity.onCreate(SplashScreenActivity.java:14)
at android.app.Activity.performCreate(Activity.java:5322)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2303)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2391)
at android.app.ActivityThread.access0(ActivityThread.java:166)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1281)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5511)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
启动画面activity
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
public class SplashScreenActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash_screen);
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
startActivity(new Intent(SplashScreenActivity.this, LoginActivity.class));
}
}, 1500);
}
}
您在初始化工具栏后调用 setContentView(R.layout.activity_welcome);。这可能会给你 nullPointerExcaption.
所以最好的做法是在 super.onCreate(savedInstanceState); 之后写 setContentView(R.layout.activity_welcome);。
示例：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
// rest of the code..
}