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.svn/pristine/26/265b77bcf7b2be41171dc6cd7152fc8173f6801f.svn-base

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+package com.yexue.android.rrxjava;
+
+import android.graphics.drawable.Drawable;
+import android.os.Build;
+import android.os.Bundle;
+import android.support.annotation.RequiresApi;
+import android.support.v4.content.ContextCompat;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.View;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import butterknife.BindView;
+import butterknife.ButterKnife;
+import butterknife.OnClick;
+import rx.Observable;
+import rx.Observer;
+import rx.Subscriber;
+import rx.functions.Action1;
+
+public class TestActivity extends AppCompatActivity {
+    private static String log = "TestActivity";
+
+    @BindView(R.id.p1_btn)
+    Button p1Btn;
+    @BindView(R.id.p1_tv)
+    TextView p1Tv;
+    @BindView(R.id.p1_btn_c)
+    Button p1BtnC;
+    @BindView(R.id.p2_btn)
+    Button p2Btn;
+    @BindView(R.id.p2_btn_c)
+    Button p2BtnC;
+    @BindView(R.id.p2_img)
+    ImageView p2Img;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_test);
+        ButterKnife.bind(this);
+        p1Btn.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                method1();
+            }
+        });
+        p1BtnC.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                p1Tv.setText("");
+            }
+        });
+    }
+
+    /**
+     * 将字符串数组 names 中的所有字符串依次打印出来：
+     */
+    private void method1() {
+        String[] names = {"张三", "lisi", "王麻子"};
+        Observable.from(names).subscribe(new Action1<String>() {
+            @Override
+            public void call(String s) {
+                String oldStr = p1Tv.getText().toString();
+                p1Tv.setText(oldStr + "\n" + s);
+            }
+        });
+    }
+
+    @OnClick({R.id.p2_btn, R.id.p2_btn_c})
+    public void onClick(View view) {
+        switch (view.getId()) {
+            case R.id.p2_btn:
+                method2(R.mipmap.a);
+                break;
+            case R.id.p2_btn_c:
+                method2(0);
+                break;
+        }
+    }
+
+    private void method2(int a) {
+        final int drawableRes = a;//-->改个没有的就会激发onError();
+        Observable.create(new Observable.OnSubscribe<Drawable>() {
+            @Override
+            public void call(Subscriber<? super Drawable> subscriber) {
+                Drawable drawable = null;
+                drawable = ContextCompat.getDrawable(TestActivity.this, drawableRes);
+                subscriber.onNext(drawable);
+                subscriber.onCompleted();
+            }
+        }).subscribe(new Observer<Drawable>() {
+            @Override
+            public void onCompleted() {
+                Log.d(log, "onCompleted");
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                e.printStackTrace();
+                Log.d(log, e.getStackTrace().toString());
+                Toast.makeText(TestActivity.this, "Error!", Toast.LENGTH_SHORT).show();
+            }
+
+            @Override
+            public void onNext(Drawable drawable) {
+                p2Img.setImageDrawable(drawable);
+            }
+        });
+    }
+}