我正在尝试使用牛油刀 http://jakewharton.github.io/butterknife/这些天我在 Android Studio 工作,但它因一些奇怪的问题而让我失望。我曾经在 eclipse 上尝试过 Butter Knife,效果很好。不知道是不是我在Android Studio配置有问题。
我按照杰克·沃顿的指示进行操作website http://jakewharton.github.io/butterknife/,但它仍然不起作用。一开始是可以编译安装的,但是之后Butterknife.inject(this)
,视图仍然为空,并且抛出空指针错误。然后我在 Android Studio 上搜索了如何配置 Butterknife,然后按照这个问题 https://stackoverflow.com/questions/21030078/android-studio-0-4-butter-knife在stackoverflow上,它无法通过编译。
然后我恢复到我的第一个版本的配置,它也开始编译失败。这是消息:
Error:(14, 12): @InjectView-annotated class incorrectly in Android framework package. (android.rocky.butterknife_test.MyActivity)
and
Error:Execution failed for task ':app:compileDebugJava'.
Compilation failed; see the compiler error output for details.
这是我的配置app/build.gradle
:
apply plugin: 'com.android.application'
android {
compileSdkVersion 20
buildToolsVersion "20.0.0"
defaultConfig {
applicationId "android.rocky.butterknife_test"
minSdkVersion 19
targetSdkVersion 20
versionCode 1
versionName "1.0"
}
buildTypes {
release {
runProguard false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
debug {
runProguard false
}
}
lintOptions {
disable 'InvalidPackage'
}
packagingOptions {
exclude 'META-INF/services/javax.annotation.processing.Processor'
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.jakewharton:butterknife:5.1.2'
}
这是我的配置build.gradle
在根:
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:0.12.+'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
mavenCentral()
}
}
这是我的Java代码:
public class MyActivity extends Activity {
@InjectView(R.id.greeting)
TextView greetingTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my);
ButterKnife.inject(this);
greetingTextView.setText("butter knife!");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.my, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
顺便说一句,我的android studio版本是0.8.2。如果您认为我粘贴的片段都很好,请告诉我粘贴其他片段。多谢!