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我使用 Butterknife 用 android studio 开发我的 APP 并在 android 4.4 中进行测试，它表现良好。

但是当我在 android 5.0 以上的手机中测试它时，它总是会抛出如下错误。

Caused by: java.lang.RuntimeException: Unable to bind views for com.quinn.githubknife.ui.activity.MainActivity
        at butterknife.ButterKnife.bind(ButterKnife.java:322)
        at butterknife.ButterKnife.bind(ButterKnife.java:237)
        at com.quinn.githubknife.ui.activity.MainActivity.onCreate(MainActivity.java:70)
        at android.app.Activity.performCreate(Activity.java:5990)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2390)
        at android.app.ActivityThread.access$800(ActivityThread.java:151)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5257)

 Caused by: ava.lang.IllegalStateException: Required view 'toolbar' with ID 2131689575 for field 'toolbar' was not found. If this view is optional add '@Nullable' annotation.
            at butterknife.ButterKnife$Finder.findRequiredView(ButterKnife.java:140)
            at com.quinn.githubknife.ui.activity.MainActivity$$ViewBinder.bind(MainActivity$$ViewBinder.java:11)
            at com.quinn.githubknife.ui.activity.MainActivity$$ViewBinder.bind(MainActivity$$ViewBinder.java:8)
            at butterknife.ButterKnife.bind(ButterKnife.java:319)
            at butterknife.ButterKnife.bind(ButterKnife.java:237)
            at com.quinn.githubknife.ui.activity.MainActivity.onCreate(MainActivity.java:70)
            at android.app.Activity.performCreate(Activity.java:5990)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2390)
            at android.app.ActivityThread.access$800(ActivityThread.java:151)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5257)
            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:903)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

我的核心java代码是：

public class MainActivity extends BaseActivity implements MainAuthView,NavigationView.OnNavigationItemSelectedListener {

    @Bind(R.id.toolbar)
    Toolbar toolbar;
    @Bind(R.id.drawer_layout)
    DrawerLayout mDrawerLayout;
    @Bind(R.id.nav_view)
    NavigationView navigationVIew;
    @Bind(R.id.viewpager)
    ViewPager viewpager;
    @Bind(R.id.tabs)
    TabLayout tab;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ButterKnife.bind(this);
}
}
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1 回答 1

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ButterKnife 无法R.id.toolbar为您的注释Toolbar视图找到并抛出一个不稳定的问题。视图的 id 错误或不存在于R.layout.activity_main. 如果您的意思是它是可选的，那么您可以添加@Nullable.

于 2015-08-19T02:55:07.797 回答