ActivityResult 让你优雅的获取Activity的返
2018-01-05 本文已影响0人
leewug
github https://github.com/lwugang/ActivityResult
allprojects {
repositories {
maven { url 'https://www.jitpack.io' }
}
}
dependencies {
compile 'com.github.lwugang:ActivityResult:ef8a6afcaf'
}
大家都知道在一个APP中,Activity之间的数据交互是经常的,
传统方式获取Activity返回值,这种方式需要操作多个方法,可读性很差
startActivityForResult(new Intent(),1);
@Override protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
//获取数据
}
ActivityResult方式 只需关注一个方法,实现方法的链式调用,可读性强,对代码无侵入,只需修改打开方式,另一个界面的逻辑无需特殊处理
ActivityResult.of(this)
.className(TestActivity.class)//目标Activity类名
//绿色通道,不走任何拦截器,直接打开目标
.greenChannel()
//transition 动画
.options(ActivityOptionsCompat.makeScaleUpAnimation(v,(int)v.getX(),(int)v.getY(),
v.getWidth()/2,v.getHeight()/2).toBundle())
//拦截器,在startActivity之前执行
.intercept(new Intercept() {
@Override public boolean onIntercept(Activity activity, ActivityResult activityResult) {
Log.e(TAG, "onIntercept: test" );
//拦截器,return true 表示拦截,之后的拦截器都不会执行
//activityResult.onContinue(); 继续执行之后的逻辑
return false;
}
}).forResult(new ActivityResultListener() {
@Override public void onReceiveResult(int resultCode, Intent data) {
// 结果处理,也就是onActivityResult方法一样
}
});
Application 中提前加入拦截器(可选)
//注册拦截器
ActivityResultManager.get()
.registerIntercept(new Intercept() {
@Override public boolean onIntercept(Activity activity,final ActivityResult activityResult) {
Log.e(TAG, "onIntercept: " );
new Thread(){
@Override public void run() {
super.run();
SystemClock.sleep(2000);
activityResult.onContinue();
}
}.start();
return true;
}
// true 表示使用一次之后就自动移除,下一次不会在执行此拦截器
},true).registerIntercept(new Intercept() {
@Override public boolean onIntercept(Activity activity, ActivityResult activityResult) {
//可以判断是否登录成功,返回对应的值
Log.e(TAG, "onIntercept2222222222: " );
return false;
}
},true);
实现分析
参考 RxPermissions 的实现方式
Activity的结果获取总是离不开系统的方式的,ActivityResult只是对系统的方式进行了一层包装,通过使用Fragment来代理,在fragment的 startActivityForResult方法来实现Activity的跳转,在fragment中的onActivityResult方法,来回调我们的接口
ActivityResult.java 核心逻辑
/**
* 通过TAG查找ActivityResultFragment
*/
Fragment findActivityResultFragment(Activity activity) {
return activity.getFragmentManager().findFragmentByTag(TAG_ACTIVITY_RESULT_FRAGMENT);
}
private ActivityResultFragment getActivityResultFragment(Activity activity) {
Fragment activityResultFragment = findActivityResultFragment(activity);
//等于null表示,我们没有在当前Activity加入fragment,
if (activityResultFragment == null) {
//创建一个ActivityResultFragment对象,通过FragmentManager#add方法添加到当前Activity中
FragmentManager fragmentManager = activity.getFragmentManager();
activityResultFragment = new ActivityResultFragment();
fragmentManager.beginTransaction()
.add(activityResultFragment, TAG_ACTIVITY_RESULT_FRAGMENT)
.commitAllowingStateLoss();
fragmentManager.executePendingTransactions();
}
return (ActivityResultFragment) activityResultFragment;
}
/**
* 以返回值方式打开对应的界面
* @param activityResultListener 可以为 null,null表示不需要处理返回值
*/
public void forResult(@Nullable ActivityResultListener activityResultListener) {
//给fragment设置我们的回调监听
resultFragment.setActivityResultListener(activityResultListener);
//绿色通道不走拦截器
if (!greenChannel) {
execIntercepts();
} else {
startActivity();
}
}
ActivityResultFragment.java
/**
* @author lwg
* @e-mail 13480020053@163.com
* @time 1/4/18
* @desc activity 结果代理fragment
*/
public class ActivityResultFragment extends Fragment {
private ActivityResultListener activityResultListener;
public ActivityResultFragment() {
}
public void setActivityResultListener(ActivityResultListener activityResultListener) {
this.activityResultListener = activityResultListener;
}
@Override public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
//回调我们的结果监听
if(activityResultListener!=null)
activityResultListener.onReceiveResult(resultCode, data);
}
}
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