compile 'com.jakewharton:butterknife:8.0.1'是最新的
插件也安装完成了import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;
public class TestActivity extends Activity {
@BindView(R.id.textView3)
TextView textView3; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
ButterKnife.bind(this); textView3.setText("不明白");//这行报空指针
}
插件也安装完成了import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;
public class TestActivity extends Activity {
@BindView(R.id.textView3)
TextView textView3; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
ButterKnife.bind(this); textView3.setText("不明白");//这行报空指针
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"> <TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Text"
android:id="@+id/textView3"
/>
</LinearLayout>
oncreate(){
ButterKnife.bind(this);
}
@Bind(R.id.textView3)
TextView tv;你要确定一下你的xml里面是否id也是textView3
import android.widget.TextView;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;import com.zgd.identify.R;import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;gradle是2.0.0
Android studio是2.1
还不行把你的Log日志贴出来
在Android studio里面直接找的
log
Process: com.zcgd.shop, PID: 23664
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.zcgd.shop/com.zcgd.TestActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2469)
at android.app.ActivityThread.access$1100(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1362)
at android.os.Handler.dispatchMessage(Handler.java:110)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:5532)
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:891)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:707)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.zcgd.TestActivity.onCreate(TestActivity.java:29)就是设置字体那儿
at android.app.Activity.performCreate(Activity.java:5350)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1088)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2381)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2469)
at android.app.ActivityThread.access$1100(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1362)
at android.os.Handler.dispatchMessage(Handler.java:110)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:5532)
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:891)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:707)
at dalvik.system.NativeStart.main(Native Method)
哦应该是这个的问题 等下去翻下文档,重新配置一下
8.0.1的小刀可能我的不合适。我昨天试用了图片上,我能搜到的版本,结果是7.0.1版本插件都不显示解决办法:
我刚才直接在gradle中直接compile 'com.jakewharton:butterknife:7.0.1',不是用as搜到的版本,然后让它自己去找,
结果就解决了。其他的我就不知道原因了,希望能有人解决感谢同志们的回答!周末愉快!
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
}
}apply plugin: 'com.neenbedankt.android-apt'dependencies {
compile 'com.jakewharton:butterknife:8.0.1'
apt 'com.jakewharton:butterknife-compiler:8.0.1'
}
在dependencies {
compile 'com.jakewharton:butterknife:7.0.1'
}有时间会去看看8.0.1
repositories {
mavenCentral()
}
dependencies {
classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
}
}apply plugin: 'com.neenbedankt.android-apt'dependencies {
compile 'com.jakewharton:butterknife:8.0.1'
apt 'com.jakewharton:butterknife-compiler:8.0.1'
}
repositories {
mavenCentral()
}
dependencies {
classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
}
}apply plugin: 'com.neenbedankt.android-apt'dependencies {
compile 'com.jakewharton:butterknife:8.0.1'
apt 'com.jakewharton:butterknife-compiler:8.0.1'
}
apply plugin: 'com.neenbedankt.android-apt'android {
compileSdkVersion 23
buildToolsVersion "23.0.2" defaultConfig {
applicationId "com.example.phc.recyclerveiwdemo"
minSdkVersion 16
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.3.0'
compile 'com.android.support:recyclerview-v7:23.3.0'
compile 'com.jakewharton:butterknife:8.0.1'
compile 'com.android.support:cardview-v7:23.3.0'
compile 'com.jakewharton:butterknife:8.0.1'
apt 'com.jakewharton:butterknife-compiler:8.0.1'
}我加了这三个就行了
1、在app的build.gradle中添加以下代码:
apply plugin: 'com.neenbedankt.android-apt' compile 'com.jakewharton:butterknife:8.0.1'
apt 'com.jakewharton:butterknife-compiler:8.0.1'
2、在项目中的build.gradle中添加了
dependencies {
classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
}
除此之外还需要 在整个工程的classpath中加入 classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8' 上次忘了
例如 buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:2.0.0'
classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}task clean(type: Delete) {
delete rootProject.buildDir
}
compileSdkVersion 23
buildToolsVersion "23.0.2" defaultConfig {
applicationId "com.excellence.netmediaplayer"
minSdkVersion 15
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
}
}apply plugin: 'com.neenbedankt.android-apt'dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.jakewharton:butterknife:8.0.1'
apt 'com.jakewharton:butterknife-compiler:8.0.1'
}http://my.oschina.net/ximidao/blog/671324?fromerr=qcSNhvAH
可以用的
compile 'com.jakewharton:butterknife-compiler:8.4.0'
compile 'com.jakewharton:butterknife:8.5.1'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.5.1'