package com.mcxtzhang.rxjavademo;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import rx.Observable;
import rx.Observer;
import rx.Subscriber;
import rx.android.schedulers.AndroidSchedulers;
import rx.functions.Action0;
import rx.functions.Action1;
import rx.functions.Func1;
import rx.schedulers.Schedulers;
public class MainActivity extends AppCompatActivity {
private static final String TAG = "RxJava";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Observer<String> observer = new Observer<String>() {
@Override
public void onCompleted() {
Log.d(TAG, "onCompleted() called");
}
@Override
public void onError(Throwable e) {
Log.d(TAG, "onError() called with: e = [" + e + "]");
}
@Override
public void onNext(String s) {
Log.d(TAG, "onNext() called with: s = [" + s + "]");
}
};
Subscriber<String> subscriber = new Subscriber<String>() {
@Override
public void onNext(String s) {
Log.d(TAG, "Item: " + s);
}
@Override
public void onCompleted() {
Log.d(TAG, "Completed!");
}
@Override
public void onError(Throwable e) {
Log.d(TAG, "Error!");
}
};
Observable observable = Observable.create(new Observable.OnSubscribe<String>() {
@Override
public void call(Subscriber<? super String> subscriber) {
subscriber.onNext("Hello");
subscriber.onNext("Hi");
subscriber.onNext("Aloha");
subscriber.onCompleted();
}
});
/**
* create() 方法是 RxJava 最基本的创造事件序列的方法。基于这个方法， RxJava 还提供了一些方法用来快捷创建事件队列，例如：
just(T...): 将传入的参数依次发送出来。
*/
Observable observable2 = Observable.just("Hello", "Hi", "Aloha");
// 将会依次调用：
// onNext("Hello");
// onNext("Hi");
// onNext("Aloha");
// onCompleted();
//from(T[]) / from(Iterable<? extends T>) : 将传入的数组或 Iterable 拆分成具体对象后，依次发送出来
String[] words = {"Hello", "Hi", "Aloha"};
Observable observable3 = Observable.from(words);
// 将会依次调用：
// onNext("Hello");
// onNext("Hi");
// onNext("Aloha");
// onCompleted();
observable3.subscribe(subscriber);
/**
* a. 打印字符串数组
将字符串数组 names 中的所有字符串依次打印出来：
*/
String[] names = new String[]{"张旭童", "大童阁", "Android"};
Observable.from(names).subscribe(new Action1<String>() {
@Override
public void call(String s) {
Log.d(TAG, "call() called with: s = [" + s + "]");
}
});
/**
* b. 由 id 取得图片并显示
由指定的一个 drawable 文件 id drawableRes 取得图片，并显示在 ImageView 中，并在出现异常的时候打印 Toast 报错：
*/
final ImageView iv = (ImageView) findViewById(R.id.iv);
final int drawableResId = R.mipmap.ic_launcher;
Observable<Drawable> imgObservable1 = Observable.create(new Observable.OnSubscribe<Drawable>() {
@Override
public void call(Subscriber<? super Drawable> subscriber) {
Drawable drawable = getResources().getDrawable(drawableResId);
subscriber.onNext(drawable);
subscriber.onCompleted();
}
});
imgObservable1.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Subscriber<Drawable>() {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
Toast.makeText(MainActivity.this, "出错了", Toast.LENGTH_SHORT).show();
}
@Override
public void onNext(Drawable drawable) {
iv.setImageDrawable(drawable);
}
});
//[map]：
// 利用变化做上面的demo
final ImageView iv2 = (ImageView) findViewById(R.id.iv2);
Observable.create(new Observable.OnSubscribe<Integer>() {
@Override
public void call(Subscriber<? super Integer> subscriber) {
subscriber.onNext(drawableResId);
subscriber.onCompleted();
}
}).map(new Func1<Integer, Drawable>() {
@Override
public Drawable call(Integer integer) {
return getTheme().getDrawable(integer);
}
}).subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Action1<Drawable>() {
@Override
public void call(Drawable drawable) {
iv2.setImageDrawable(drawable);
}
}, new Action1<Throwable>() {
@Override
public void call(Throwable throwable) {
Log.e(TAG, "call: 出错了加载图片出错了");
}
});
iv2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.d(TAG, "onClick() called with: view = [" + view + "]");
}
});
final Observable<String> throttleFirst = Observable.just("什么鬼")
.throttleFirst(500, TimeUnit.MILLISECONDS);//500秒不会重复发出事件;
findViewById(android.R.id.content).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
throttleFirst.subscribeOn(Schedulers.computation())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Action1<String>() {
@Override
public void call(String s) {
Log.d(TAG, "防止重复点击吗？call() called with: s = [" + s + "]");
}
});
}
});
final TextView tv = (TextView) findViewById(R.id.tv);
tv.setText("切换前");
findViewById(R.id.iv2).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new Thread(new Runnable() {
@Override
public void run() {
Log.d(TAG, "run() called" + Thread.currentThread());
func();
}
}).start();
//func();
}
public void func() {
Log.d(TAG, "func() called" + Thread.currentThread());
Observable.create(new Observable.OnSubscribe<String>() {
@Override
public void call(Subscriber<? super String> subscriber) {
Log.d(TAG, "Observable called" + Thread.currentThread());
subscriber.onNext("呵呵哒");
subscriber.onCompleted();
}
})
.subscribeOn(Schedulers.computation())
.subscribeOn(AndroidSchedulers.mainThread())//即使重复写 但是以上面那个为准
.doOnSubscribe(new Action0() {//可以设置start所在现成的onStart方法
@Override
public void call() {
Log.d(TAG, "doOnSubscribe called" + Thread.currentThread());
tv.setText("doOnSubscribe");
}
})
// .subscribeOn(Schedulers.io())//改变doOnSubscribe的线程，这离doOnSubscribe这句话最近
// .subscribeOn(AndroidSchedulers.mainThread())//即使重复写 但是以上面那个为准
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Action1<String>() {
@Override
public void call(String s) {
Log.d(TAG, "subscribe call() called with: s = [" + s + "]" + Thread.currentThread());
}
});
}
});
Observable.just("On", "Off", "On", "Off")
.filter(new Func1<String, Boolean>() {
@Override
public Boolean call(String s) {
return s != null;
}
}).subscribe(new Subscriber<String>() {
@Override
public void onCompleted() {
Log.d("DDDDDD", "结束观察...\n");
}
@Override
public void onError(Throwable e) {
//出现错误会调用这个方法
}
@Override
public void onNext(String s) {
//处理事件
Log.d("DDDDD", "handle this---" + s);
}
});
//※线程切换 看这里
//一个重点是 map内部会保持顺序，而map之间不一定保持顺序
//例如下面 map 1 2 3 ，内部又 5 9 。
//也就是说 只能保证 5 是按 map 1 2 3 顺序走
//不一定保证 51 91 52 92 53 93 的顺序
/**
* 12-02 02:54:03.967 9062-9115/com.mcxtzhang.rxjavademo E/RxJava: before onCompleted():Thread[RxIoScheduler-5,5,main]
12-02 02:54:03.967 9062-9062/com.mcxtzhang.rxjavademo E/RxJava: map1: 5 map1, xiancheng:Thread[main,5,main]
12-02 02:54:03.967 9062-9062/com.mcxtzhang.rxjavademo E/RxJava: map1: 9 map1, xiancheng:Thread[main,5,main]
12-02 02:54:03.967 9062-9114/com.mcxtzhang.rxjavademo E/RxJava: map2: 5 map1 map2, xiancheng:Thread[RxIoScheduler-4,5,main]
12-02 02:54:03.968 9062-9062/com.mcxtzhang.rxjavademo E/RxJava: map3: 5 map1 map2 map3, xiancheng:Thread[main,5,main]
12-02 02:54:03.968 9062-9114/com.mcxtzhang.rxjavademo E/RxJava: map2: 9 map1 map2, xiancheng:Thread[RxIoScheduler-4,5,main]
12-02 02:54:03.968 9062-9062/com.mcxtzhang.rxjavademo E/RxJava: map3: 9 map1 map2 map3, xiancheng:Thread[main,5,main]
*/
findViewById(R.id.tv).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Subscriber<String> subscriber1 = new Subscriber<String>() {
@Override
public void onStart() {
Log.d(TAG, "onStart() called" + ", xiancheng:" + Thread.currentThread());
}
@Override
public void onCompleted() {
Log.e(TAG, "onCompleted: " + ", xiancheng:" + Thread.currentThread());
}
@Override
public void onError(Throwable e) {
Log.e(TAG, "onError: " + ", xiancheng:" + Thread.currentThread());
}
@Override
public void onNext(String s) {
Log.d(TAG, "onNext() called with: Subscriber = [" + this + "]");
Log.e(TAG, "onNext: " + s + ", xiancheng:" + Thread.currentThread());
}
};
Log.d(TAG, "onClick() called with: subscriber1 = [" + subscriber1 + "]");
Observable.create(new Observable.OnSubscribe<Integer>() {
@Override
public void call(Subscriber<? super Integer> subscriber) {
Log.d(TAG, "call() called with: subscriber = [" + subscriber + "]");
Log.e(TAG, "before onNext(5):" + Thread.currentThread());
subscriber.onNext(5);
Log.e(TAG, "before onNext(9):" + Thread.currentThread());
subscriber.onNext(9);
Log.e(TAG, "before onCompleted():" + Thread.currentThread());
subscriber.onCompleted();
}
})
//这句话改变的应该是Obervable的执行线程
.subscribeOn(Schedulers.io())
//这句话不会改变map的执行线程,也不会改变Observable的执行线程
.subscribeOn(AndroidSchedulers.mainThread())
//改变的临近的一个map Subscriber 的执行线程
.observeOn(AndroidSchedulers.mainThread())
.map(new Func1<Integer, String>() {
@Override
public String call(Integer integer) {
Log.e(TAG, "map1: " + integer + " map1" + ", xiancheng:" + Thread.currentThread());
return integer + " map1";
}
})
.observeOn(Schedulers.io())
.map(new Func1<String, String>() {
@Override
public String call(String s) {
Log.e(TAG, "map2: " + s + " map2" + ", xiancheng:" + Thread.currentThread());
return s + " map2";
}
})
.observeOn(AndroidSchedulers.mainThread())
.map(new Func1<String, String>() {
@Override
public String call(String s) {
Log.e(TAG, "map3: " + s + " map3" + ", xiancheng:" + Thread.currentThread());
return s + " map3";
}
})
/* .subscribeOn(Schedulers.io())
*/
.observeOn(Schedulers.io())
.subscribe(subscriber1);
}
});
findViewById(R.id.btnJust).setOnClickListener(new View.OnClickListener() {
String TAG = "zxt";
@Override
public void onClick(View v) {
Integer[] array1 = new Integer[]{1, 2, 3, 4, 5, 6};
Integer[] array2 = new Integer[]{11, 12, 13, 14, 15, 16};
Observable<Integer[]> observable1 = Observable.just(array1, array2);
observable1.subscribe(new Subscriber<Integer[]>() {
@Override
public void onStart() {
super.onStart();
}
@Override
public void onCompleted() {
Log.d(TAG, "onCompleted() called");
}
@Override
public void onError(Throwable e) {
Log.d(TAG, "onError() called with: e = [" + e + "]");
}
@Override
public void onNext(Integer[] integers) {
Log.d(TAG, "onNext() called with: integers = [" + integers + "]");
}
});
}
});
findViewById(R.id.btnInterval).setOnClickListener(new View.OnClickListener() {
String TAG = "zxt";
@Override
public void onClick(View v) {
//定时器的just 没有任何卵用，他只是timer的作用。 我也不太清楚要如何停止 才不会内存泄漏
Observable.just(1, 2, 3, 4)
.interval(3, 3, TimeUnit.SECONDS).
subscribe(new Action1<Long>() {
@Override
public void call(Long aLong) {
Log.d(TAG, "call() called with: aLong = [" + aLong + "]");
}
});
}
});
findViewById(R.id.btnRange).setOnClickListener(new View.OnClickListener() {
String TAG = "zxt";
@Override
public void onClick(View v) {
//从5 开始，数10个，即5-14
Observable.range(5, 10).subscribe(new Subscriber<Integer>() {
@Override
public void onCompleted() {
Log.d(TAG, "onCompleted() called");
}
@Override
public void onError(Throwable e) {
Log.d(TAG, "onError() called with: e = [" + e + "]");
}
@Override
public void onNext(Integer integer) {
Log.d(TAG, "onNext() called with: integer = [" + integer + "]");
}
});
}
});
findViewById(R.id.btnFilter).setOnClickListener(new View.OnClickListener() {
String TAG = "zxt";
@Override
public void onClick(View v) {
Observable.create(new Observable.OnSubscribe<Integer>() {
@Override
public void call(Subscriber<? super Integer> subscriber) {
if (!subscriber.isUnsubscribed()) {
subscriber.onNext(1);
subscriber.onNext(50);
subscriber.onNext(25);
subscriber.onCompleted();
}
}
}).filter(new Func1<Integer, Boolean>() {
@Override
public Boolean call(Integer integer) {
return (integer & 1) == 0;
}
}).subscribe(new Subscriber<Integer>() {
@Override
public void onCompleted() {
Log.d(TAG, "onCompleted() called");
}
@Override
public void onError(Throwable e) {
Log.d(TAG, "onError() called with: e = [" + e + "]");
}
@Override
public void onNext(Integer integer) {
Log.d(TAG, "onNext() called with: integer = [" + integer + "]");
}
});
}
});
//flatMap Demo
findViewById(R.id.btnFlatMap).setOnClickListener(new View.OnClickListener() {
String TAG = "zxt";
@Override
public void onClick(View view) {
//flatmap使用：
List<Student> students = new ArrayList<>();
students.add(new Student());
students.add(new Student());
students.add(new Student());
students.add(new Student());
students.add(new Student());
Subscriber<Course> courseSubscriber = new Subscriber<Course>() {
@Override
public void onCompleted() {
Log.d(TAG, "course onCompleted() called");
}
@Override
public void onError(Throwable e) {
Log.d(TAG, "course onError() called with: e = [" + e + "]");
}
@Override
public void onNext(Course course) {
Log.d(TAG, "onNext() called with: course = [" + course.getScroe() + "]");
}
};
Observable.from(students).flatMap(new Func1<Student, Observable<Course>>() {
@Override
public Observable<Course> call(Student student) {
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return Observable.from(student.getCourse());
}
}).subscribeOn(Schedulers.io())//加上这句话 Observable的动作都在io线程里
.observeOn(AndroidSchedulers.mainThread())
.subscribe(courseSubscriber);
}
});
//doOnSubscribe 实例：
findViewById(R.id.btndoOnSubscribe).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Observable.create(new Observable.OnSubscribe<String>() {
@Override
public void call(Subscriber<? super String> subscriber) {
if (!subscriber.isUnsubscribed()) {
Log.d(TAG, "subscriber.onNext(\"测试\");" + ", xiancheng:" + Thread.currentThread());
subscriber.onNext("测试");
subscriber.onCompleted();
}
}
})
.subscribeOn(Schedulers.computation())
.doOnSubscribe(new Action0() {
@Override
public void call() {
Log.d(TAG, "doOnSubscribe" + ", xiancheng:" + Thread.currentThread());
}
})
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.observeOn(Schedulers.io())
.subscribe(new Subscriber<String>() {
@Override
public void onStart() {
Log.d(TAG, "onStart() called" + Thread.currentThread());
super.onStart();
}
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
}
@Override
public void onNext(String s) {
}
});
}
});
findViewById(R.id.btnLoop).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mTestLeak = new Subscriber<String>() {
@Override
public void onCompleted() {
Log.d(TAG, "onCompleted() called");
}
@Override
public void onError(Throwable e) {
Log.d(TAG, "onError() called with: e = [" + e + "]");
}
@Override
public void onNext(String s) {
Log.d(TAG, "onNext() called with: s = [" + s + "]");
}
};
Observable.create(new Observable.OnSubscribe<String>() {
@Override
public void call(Subscriber<? super String> subscriber) {
int i = 0;
while (true) {
Log.d(TAG, "call() called with: i = [" + i + "]");
subscriber.onNext(i++ + "");
}
}
}).subscribe(mTestLeak);
}
});
findViewById(R.id.btnStop).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mTestLeak.unsubscribe();
}
});
}
private Subscriber mTestLeak;
}