Android学习笔记-Android初级 (二)

1.ApacheHttpClient_Get请求

package com.recycler.zx.zxrecyclerview.ApacheHttpClient;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.HttpStatus;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.util.EntityUtils;import java.io.IOException;/** * Created by zx on 2015/12/24. * get:大小不超过4kb，速度快，参数会在URL上面显示，不安全 * post：大小不限制，速度比get慢，参数不会在URL上显示，安全性高 */public class ApacheHttpClientGet {    public static void httpGet(final String path){        new Thread(new Runnable() {            @Override            public void run() {                HttpGet get = new HttpGet(path);                //创建http客户端对象，用于发送请求                HttpClient httpClient = new DefaultHttpClient();                try {                    //向服务器发送请求，并返回响应对象                    HttpResponse response = httpClient.execute(get);                    //获取响应状态码                    int status = response.getStatusLine().getStatusCode();                    switch (status) {                        case HttpStatus.SC_OK :                            //200                            HttpEntity httpEntity = response.getEntity();                            String result = EntityUtils.toString(httpEntity,"utf-8");                            break;                        case HttpStatus.SC_NOT_FOUND :                            //404                            break;                        case HttpStatus.SC_INTERNAL_SERVER_ERROR :                            //500                            break;                    }                } catch (Exception e) {                    e.printStackTrace();                }            }        }).start();    }}

2.ApacheHttpClient_Post请求

package com.recycler.zx.zxrecyclerview.ApacheHttpClient;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.HttpStatus;import org.apache.http.NameValuePair;import org.apache.http.client.HttpClient;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.message.BasicNameValuePair;import org.apache.http.util.EntityUtils;import java.lang.reflect.Array;import java.util.ArrayList;/** * Created by zx on 2015/12/24. */public class ApacheHttpClientPost {    public static void httpPost(final String path){        new Thread(new Runnable() {            @Override            public void run() {                try {                HttpPost httpPost = new HttpPost(path);                //创建http客户端对象，用于发送请求                ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();                    params.add(new BasicNameValuePair("name","jack"));                    params.add(new BasicNameValuePair("sex","nan"));                HttpEntity entity = new UrlEncodedFormEntity(params);                    httpPost.setEntity(entity);                    HttpClient httpClient = new DefaultHttpClient();                    //向服务器发送请求，并返回响应对象                    HttpResponse response = httpClient.execute(httpPost);                    //获取响应状态码                    int status = response.getStatusLine().getStatusCode();                    switch (status) {                        case HttpStatus.SC_OK :                            //200                            HttpEntity httpEntity = response.getEntity();                            String result = EntityUtils.toString(httpEntity,"utf-8");                            break;                        case HttpStatus.SC_NOT_FOUND :                            //404                            break;                        case HttpStatus.SC_INTERNAL_SERVER_ERROR :                            //500                            break;                    }                } catch (Exception e) {                    e.printStackTrace();                }            }        }).start();    }}

3.Volley和android-Async-http和okhttp

Volley:
优点：频繁通信适合
缺点：大文件下载上传不是很擅长
android-Async-http：(这个开源项目已经很老了，它的fork比较多，也是因为在3,4年前出现的
出现的比较早，在前几年它可能是比较好用的，并且它的httpClient和Apatch中httpClient是不一样的；
Apatch已经更新了httpClient，而它还用的是以前版本的httpClient，不得不说它也不再流行了)
优点：下载上传擅长有API
缺点：目前不知道
目前最佳：Volley+okhttp

Android Studio的gradle依赖
你需要在app模块的build.gradle文件中添加如下几行代码：

compile ‘com.squareup.okio:okio:1.5.0’
compile ‘com.squareup.okhttp:okhttp:2.4.0’
compile ‘com.mcxiaoke.volley:library:1.0.16’
compile ‘com.google.code.gson:gson:2.3.1’

以上几个依赖都是官方的，虽然Volley不是官方提供的，但是也值得信赖

来源： http://www.open-open.com/lib/view/open1437532961428.html

4.android-async-http上传下载

上传文件的3中方式：其实最终都是转换成流了

5.WebService

package com.recycler.zx.zxrecyclerview.volleyAndAsyncAndWebservice;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.Button;import com.recycler.zx.zxrecyclerview.R;import org.ksoap2.SoapEnvelope;import org.ksoap2.serialization.SoapObject;import org.ksoap2.serialization.SoapSerializationEnvelope;import org.ksoap2.transport.HttpTransportSE;import java.lang.ref.WeakReference;import butterknife.Bind;import butterknife.ButterKnife;public class WebServiceActivity extends AppCompatActivity {    @Bind(R.id.button4)    Button button4;    private MyHandler myHandler;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_web_service);        ButterKnife.bind(this);    }    public void webServiceClick(View v) {        myHandler = new MyHandler(this);        new Thread(new Runnable() {            @Override            public void run() {                getTelephoneInfo("13888888888");            }        }).start();    }    private static class MyHandler extends Handler {        private WeakReference<WebServiceActivity> mWeakReference;        private WebServiceActivity mActivity;        public MyHandler(WebServiceActivity activity) {            mWeakReference = new WeakReference<WebServiceActivity>(activity);            mActivity = mWeakReference.get();        }        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            if (mActivity != null) {                String result = (String) msg.obj;                mActivity.button4.setText(result);            }        }    }    public void getTelephoneInfo(String phone_number) {        //命名空间        String nameSpace = "http://WebXml.com.cn/";        //调用的方法名称        String methodName = "getMobileCodeInfo";        // webservice的网址        String URL = "http://webservice.webxml.com.cn/WebServices/MobileCodeWS.asmx";        //命名空间+方法        String soapAction = "http://WebXml.com.cn/getMobileCodeInfo";        // 指定WebService的命名空间和调用的方法名        SoapObject rpc = new SoapObject(nameSpace, methodName);        // 设置需调用WebService接口需要传入的两个参数mobileCode、userId        rpc.addProperty("mobileCode", phone_number);        rpc.addProperty("userId", "");        // 生成调用WebService方法的SOAP请求信息,并指定SOAP的版本        SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER12);        envelope.bodyOut = rpc;        // 设置是否调用的是dotNet开发的WebService        envelope.dotNet = true;        // 等价于       /* envelope.bodyOut = rpc;        envelope.setOutputSoapObject(rpc);*/        HttpTransportSE transport = new HttpTransportSE(URL);        try {            // 调用WebService            transport.call(soapAction, envelope);        } catch (Exception e) {            e.printStackTrace();        }        // 获取返回的数据        SoapObject object = (SoapObject) envelope.bodyIn;        // 获取返回的结果        String result = object.getProperty(0).toString();        Message msg = myHandler.obtainMessage();        msg.obj = result;        myHandler.sendMessage(msg);    }}

6.WebView与js交互

private void initWebView() {   WebSettings settings =  wvList.getSettings();    settings.setJavaScriptEnabled(true);    settings.setBuiltInZoomControls(true);    wvList.requestFocus();    wvList.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);    //设置点击链接在webview中显示    wvList.setWebViewClient(new WebViewClient());    wvList.setWebChromeClient(new WebChromeClient());    //wvList.loadUrl("http://www.baidu.com/");    myHandler = new MyHandler(this);    wvList.addJavascriptInterface(new myObj(),"myweb");    wvList.loadUrl("file:///android_asset/html/index.html");}public class myObj{    @JavascriptInterface    public void toWeb(){        myHandler.post(new Runnable() {            @Override            public void run() {                wvList.loadUrl("javascript:myfun()");            }        });    }}<html lang="en"><head>    <title>Document</title>    <script language="JavaScript">        function myfun(){        document.getElementById("imgId").src="b.jpg";        }    </script></head><body><a onclick="window.myweb.toWeb()"><img src="a.jpg" id="imgId" /></a></body></html>

7.属性动画和视图动画（tween（补间动画），frame（帧动画））

package com.recycler.zx.zxrecyclerview.tweenAndframe;import android.animation.Animator;import android.animation.AnimatorInflater;import android.animation.AnimatorListenerAdapter;import android.animation.AnimatorSet;import android.animation.ObjectAnimator;import android.animation.ValueAnimator;import android.graphics.drawable.AnimationDrawable;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.util.DisplayMetrics;import android.view.View;import android.view.ViewGroup;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.view.animation.BounceInterpolator;import android.widget.ImageView;import android.widget.Toast;import com.recycler.zx.zxrecyclerview.R;import butterknife.Bind;import butterknife.ButterKnife;//android 中的动画注意：视图动画：animation（动画），属性动画：animator（动画绘制者）public class AnimationsActivity extends AppCompatActivity {    @Bind(R.id.iv_tween)    ImageView ivTween;    @Bind(R.id.iv_frame)    ImageView ivFrame;    @Bind(R.id.iv_attribute)    ImageView ivAttribute;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_animations);        ButterKnife.bind(this);    }//**************************************************************************************************视图动画    public void tween(View v) {        //1.xml中创建动画 alpha_anim.xml//渐渐消失        Animation animation = AnimationUtils.loadAnimation(this, R.anim.rotate_anim);        ivTween.startAnimation(animation);        //2.直接在程序中创建动画        // Animation animation2 = new AlphaAnimation(0.0f,1.0f);        //ivAnim.startAnimation(animation2);    }    public void frame(View v) {        AnimationDrawable animation = (AnimationDrawable) ivFrame.getDrawable();        animation.start();    }    //**************************************************************************************************属性动画    //属性动画有代码实现和xml实现2中    //属性动画，，用的最多，下面先代码实现再xml实现(xml中属性动画在animator文件夹中，视图动画是在anim文件夹中)    public void attribute(View v) {        ObjectAnimator         .ofFloat(ivAttribute, "rotationx", 0.0f, 360.0f)         .setDuration(500).start();    }    public void propertyValuesHolder(View v){        //ObjectAnimator        /*PropertyValuesHolder phx = PropertyValuesHolder.ofFloat("alpha",1f,0f,1f);        PropertyValuesHolder phy = PropertyValuesHolder.ofFloat("scaleX",1f,0,1f);        PropertyValuesHolder phz = PropertyValuesHolder.ofFloat("scaleY",1f,0,1f);        ObjectAnimator.ofPropertyValuesHolder(v,phx,phy,phz).setDuration(5000).start();*/        //ValueAnimator        final View view = v;        DisplayMetrics dm = new DisplayMetrics();        getWindowManager().getDefaultDisplay().getMetrics(dm);        //定义一个动画        ValueAnimator anim = ValueAnimator.ofFloat(v.getX(),dm.widthPixels+v.getWidth(),v.getX()).setDuration(500);        //监听动画的每个动作        anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener(){            @Override            public void onAnimationUpdate(ValueAnimator animation) {                view.setTranslationX((Float) animation.getAnimatedValue());            }        });        anim.start();    }    public void animListener(final View v){        //1f：开始，0f：结束        ObjectAnimator anim = ObjectAnimator.ofFloat(v,"alpha",1f,0f).setDuration(500);        anim.addListener(new Animator.AnimatorListener() {            @Override            public void onAnimationStart(Animator animation) {                //动画开始            }            @Override            public void onAnimationEnd(Animator animation) {            //动画结束                ViewGroup vg = (ViewGroup) v.getParent();                if(vg != null) {                    vg.removeView(v);                    Toast.makeText(AnimationsActivity.this,"已删除view",Toast.LENGTH_SHORT).show();                }            }            @Override            public void onAnimationCancel(Animator animation) {            //取消动画            }            @Override            public void onAnimationRepeat(Animator animation) {            //重复播放            }        });        //上面的方法比较麻烦，如果你只想使用onAnimationEnd（其中一个方法就不方便）        // 可以直接使用监听适配器，实现单个方法，比较灵活        anim.addListener(new AnimatorListenerAdapter() {            @Override            public void onAnimationEnd(Animator animation) {                super.onAnimationEnd(animation);                //动画结束                ViewGroup vg = (ViewGroup) v.getParent();                if(vg != null) {                    vg.removeView(v);                    Toast.makeText(AnimationsActivity.this,"已删除view",Toast.LENGTH_SHORT).show();                }            }        });        anim.start();    }    //排序播放动画，不是同时播发，（比如，先播发a动画，再播放b动画）    public void animSet(View v){        ObjectAnimator oax = ObjectAnimator.ofFloat(v,"translationX",0f,200f);        ObjectAnimator oay = ObjectAnimator.ofFloat(v,"translationY",0f,200f);        ObjectAnimator oarotation = ObjectAnimator.ofFloat(v,"rotation",0f,360.0f);        AnimatorSet set = new AnimatorSet();        set.setDuration(2000);        //排序设置        //set.playTogether(oax,oay,oarotation);//3个动画同时执行        //set.playSequentially(oay,oax,oarotation);//按参数顺序执行        //set.setStartDelay(300);//延迟执行        //oax,oay同时执行，之后执行oarotation        set.play(oax).with(oay);        set.play(oarotation).after(oay);        set.start();        //注意：不能set.play(oax).with(oay).after().before()连接太长    }   /* 插值器,就是告诉Android,播放动画时    是从快到慢还是从慢到快,从左到右的旋转还是其它的方式的动画, 类型如下面的八种，跟scale.xml或alpha.xml中使用的插值器一样的,只是写的形式不一样而已 所有的插值器都实现Interpolator接口中的 getInterpolation(float input)方法， 注意一点,插值器不能同时set多个,不然最前面的会被覆盖,即:无效果..   /* new AccelerateDecelerateInterpolator();    * new AccelerateInterpolator();    * new CycleInterpolator(1.0f);    * new DecelerateInterpolator();    * new AnticipateInterpolator();    * new AnticipateOvershootInterpolator();    * new BounceInterpolator();    * new OvershootInterpolator();    * new LinearInterpolator();    * 与以上几种插值器相对应的方法在xml文件中的使用方式大家可以自动ALT+/试下,换汤不换药    */    public void interpolators(View v){        ObjectAnimator oax = ObjectAnimator.ofFloat(v,"translationX",0f,200f);        ObjectAnimator oay = ObjectAnimator.ofFloat(v,"translationY",0f,200f);        ObjectAnimator oarotation = ObjectAnimator.ofFloat(v,"rotation",0f,360.0f);        AnimatorSet set = new AnimatorSet();        set.playTogether(oax,oay,oarotation);//3个动画同时执行        //插值器不能同时set多个        set.setInterpolator(new BounceInterpolator());        set.setDuration(5000);        set.start();    }    public void attributeAnimator(View v){        Animator animator = AnimatorInflater.loadAnimator(this,R.animator.alpha);        /*v.setPivotX(0);        v.setPivotY(0);        //如果调用了pivot设置了位置，就必须调用invalidate更新一下        v.invalidate();*/        animator.setTarget(v);        animator.start();    }}

8.插值器常用方法

9.画布与绘制 ，几何图形与绘制

平常开发用的比较少，具体可以去搜索Canvas
绘制图片到画布上面，一般用于自定义view和游戏

package com.recycler.zx.zxrecyclerview.tweenAndframe;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.graphics.Paint;import android.view.View;import com.recycler.zx.zxrecyclerview.R;/** * Created by zx on 2015/12/22. */public class BitmapView extends View {    public BitmapView(Context context) {        super(context);    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        Paint paint = new Paint();        Bitmap bp = BitmapFactory.decodeResource(getResources(), R.mipmap.a);        canvas.drawBitmap(bp,0,0,paint);    }}

surfaceView用独立的线程来进行绘制， 因此可以提供更多的帧率
一般用于游戏