在实际的开发中,通常有这样一个需求,就是测试阶段需要添加一些测试库,正式版本阶段就去掉。下面拿leakcanary这个库来说明一下具体的实现方法:
1. 在app下的build.gradle添加 debugCompile 'com.squareup.leakcanary:leakcanary-android:1.5.1 //重点是debugCompile,表示测试版本编译进去,正式版本不编译进去
2. 在自定义的Application里面添加如下代码:
if (BuildConfig.DEBUG) {
Class<?> leakCanary = ReflectUtils.getReflectClass("com.squareup.leakcanary.LeakCanary");
Object isInAnalyzerProcess = ReflectUtils.invokeMethod(leakCanary, "isInAnalyzerProcess", new Class[]{Context.class}, this);
if (!(isInAnalyzerProcess instanceof Boolean && (Boolean) isInAnalyzerProcess)) {
ReflectUtils.invokeMethod(leakCanary, "install", new Class[]{Application.class}, this);
}
//if (!com.squareup.leakcanary.LeakCanary.isInAnalyzerProcess(this)) {
// com.squareup.leakcanary.LeakCanary.install(this);
//}
}
//只有在debug版本阶段才会反射调用,因为只有在debug阶段才会把leakcanary这个库编译进来。
ReflectUtils全部代码如下:
public class ReflectUtils {
public static Object invokeMethod(String clazzName, String methodName, Class<?>[] argsTypes, Object... argsValue) {
return invokeMethod(getReflectClass(clazzName), methodName, argsTypes, argsValue);
}
public static Object invokeMethod(Class clazz, String methodName, Class<?>[] argsTypes, Object... argsValue) {
if (clazz == null) {
LogUtils.d("clazz == null in invokeMethod,clazz:" + clazz + ",methodName:" + methodName);
return null;
}
final Method method = getReflectMethod(clazz, methodName, argsTypes);
if (method == null) {
LogUtils.d("method == null in invokeMethod,clazz:" + clazz + ",methodName:" + methodName);
return null;
}
try {
return method.invoke(Modifier.isStatic(method.getModifiers()) ? null : clazz, argsValue);
} catch (IllegalAccessException e) {
e.printStackTrace();
LogUtils.d("method.invoke IllegalAccessException in invokeMethod,clazz:" + clazz + ",methodName:" + methodName);
} catch (InvocationTargetException e) {
e.printStackTrace();
LogUtils.d("method.invoke InvocationTargetException in invokeMethod,clazz:" + clazz + ",methodName:" + methodName);
}
return null;
}
public static Class<?> getReflectClass(String clazzName) {
try {
return Class.forName(clazzName);
} catch (ClassNotFoundException e) {
e.printStackTrace();
LogUtils.d("Class.forName ClassNotFoundException in getReflectClass,clazzName:" + clazzName);
}
return null;
}
public static Method getReflectMethod(Class clazz, String methodName, Class<?>[] argsTypes) {
try {
//Method method = clazz.getMethod(methodName, argsTypes); //这行代码只能获取到public方法
Method method = clazz.getDeclaredMethod(methodName, argsTypes);
if (method != null && !Modifier.isPublic(method.getModifiers())) {//非public方法
method.setAccessible(true);
}
return method;
} catch (NoSuchMethodException e) {
e.printStackTrace();
LogUtils.d("clazz.getMethod NoSuchMethodException in getReflectMethod,clazz:" + clazz + ",methodName:" + methodName);
}
return null;
}
}