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; } }