模仿微信图片点击全屏效果
Jupiter
8年前
<p>昨天想着模仿写些什么，然后觉得什么仿京东啊，仿美团之类的外面都有，正好又找到点资源就写了这篇“高仿微信图片放大”</p> <p>废话不多说，先看下效果：</p> <p>先是微信的</p> <p><img alt="这里写图片描述" src="https://simg.open-open.com/show/b90974b0f1fdd8bd119ad1eb540e4400.gif"></p> <p>再是模仿的</p> <p><img alt="这里写图片描述" src="https://simg.open-open.com/show/5a04c193c29c203493785b9f7b5d8a26.gif"></p> <p>包目录</p> <p><img alt="这里写图片描述" src="https://simg.open-open.com/show/f09510793190afd0080f608574185919.png"></p> <p>先说下实现原理，再一步步分析</p> <p>这里总共有2个Activity一个就是主页，一个就是显示我们图片效果的页面，参数通过Intent传送，素材内容均来自网络，(感谢<a href="http://weibo.com/2657719753/profile?topnav=1&wvr=6">聪明的蘑菇</a>) 图片都是<strong>Glide</strong>异步下的，下的，下的重要的事情说三次，然后就是用动画做放大操作然后显示出来了（并没有做下载原图的实现，反正也是一样 下载下来Set上去而且动画都不需要更简便）。</p> <p>OK，我们来看分析下</p> <p>obj，目录下分别创建了2个对象，一个用来使用来处理显示页面的图片尺寸信息以及位置信息，还有一个是用来附带URL和分辨率</p> <p>Config这个类就是我们的URL了没其他什么内容。</p> <p>我们一个一个页面来看，先看MainActivity</p> <p>他做的事情很简单，就是把下个页面的一些信息初始化一下然后通过Intent传过去，本身不做什么多余操作</p> <pre> <code class="language-java">package wjj.com.imitatewechatimage.activity; import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.ImageView; import wjj.com.imitatewechatimage.R; import com.apkfuns.logutils.LogUtils; import com.bumptech.glide.Glide; import wjj.com.imitatewechatimage.Config; import wjj.com.imitatewechatimage.obj.ImageInfoObj; import wjj.com.imitatewechatimage.obj.ImageWidgetInfoObj; public class MainActivity extends AppCompatActivity implements View.OnClickListener { private ImageView imageView; private ImageInfoObj imageInfoObj; private ImageWidgetInfoObj imageWidgetInfoObj; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); findId(); init(); Listener(); } private void findId() { imageView = (ImageView) findViewById(R.id.imageView); } private void init() { Glide.with(MainActivity.this).load(Config.IMAGE_URL).placeholder(R.mipmap.maimai).into(imageView); imageInfoObj = new ImageInfoObj(); imageInfoObj.imageUrl = Config.IMAGE_URL; imageInfoObj.imageWidth = 1280; imageInfoObj.imageHeight = 720; imageWidgetInfoObj = new ImageWidgetInfoObj(); imageWidgetInfoObj.x = imageView.getLeft(); imageWidgetInfoObj.y = imageView.getTop(); imageWidgetInfoObj.width = imageView.getLayoutParams().width; imageWidgetInfoObj.height = imageView.getLayoutParams().height; } private void Listener() { imageView.setOnClickListener(this); } @Override protected void onResume() { super.onResume(); LogUtils.d("--->MainActivity onResume"); } @Override protected void onPause() { super.onPause(); LogUtils.d("--->MainActivity onPause"); } @Override protected void onDestroy() { super.onDestroy(); LogUtils.d("--->MainActivity onDestroy"); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.imageView: //携带参数跳转 Intent intent = new Intent(MainActivity.this, howImageActivity.class); intent.putExtra("imageInfoObj", imageInfoObj); intent.putExtra("imageWidgetInfoObj", imageWidgetInfoObj); startActivity(intent); break; default: break; } } } </code></pre> <p>具体业务类ShowImageActivity</p> <pre> <code class="language-java">public class ShowImageActivity extends AppCompatActivity { private RelativeLayout MainView; private ImageView showImageView; private ImageInfoObj imageInfoObj; private ImageWidgetInfoObj imageWidgetInfoObj; Button button; // 屏幕宽度 public float Width; //原图高 private float y_img_h; // 屏幕高度 public float Height; private float size, size_h, img_w, img_h; protected float to_x = 0; protected float to_y = 0; private float tx; private float ty; private final Spring spring = SpringSystem .create() .createSpring() .addListener(new ExampleSpringListener()); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_how_image); LogUtils.d("--->ShowImageActivity onCreate"); findId(); init(); Listener(); } private void findId() { MainView = (RelativeLayout) findViewById(R.id.MainView); button = (Button) findViewById(R.id.button); } private void init() { DisplayMetrics dm = getResources().getDisplayMetrics(); Width = dm.widthPixels; Height = dm.heightPixels; imageInfoObj = (ImageInfoObj) getIntent().getSerializableExtra("imageInfoObj"); imageWidgetInfoObj = (ImageWidgetInfoObj) getIntent().getSerializableExtra("imageWidgetInfoObj"); if (imageInfoObj == null) { LogUtils.d("--->imageInfoObj==null"); } if (imageWidgetInfoObj == null) { LogUtils.d("--->imageWidgetInfoObj==null"); } showImageView = new ImageView(this); showImageView.setScaleType(ImageView.ScaleType.CENTER_CROP); Glide.with(ShowImageActivity.this).load(imageInfoObj.imageUrl).into(showImageView); img_w = imageWidgetInfoObj.width; img_h = imageWidgetInfoObj.height - 300; size = Width / img_w; y_img_h = imageInfoObj.imageHeight * Width / imageInfoObj.imageWidth; size_h = y_img_h / img_h; RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams((int) imageWidgetInfoObj.width, (int) imageWidgetInfoObj.height); p.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE); p.addRule(RelativeLayout.CENTER_VERTICAL, RelativeLayout.TRUE); showImageView.setLayoutParams(p); p.setMargins((int) imageWidgetInfoObj.x, (int) imageWidgetInfoObj.y, (int) (Width - (imageWidgetInfoObj.x + imageWidgetInfoObj.width)), (int) (Height - (imageWidgetInfoObj.y + imageWidgetInfoObj.height))); MainView.addView(showImageView); new Handler().post(new Runnable() { public void run() { ShowImageView(); } }); } private void Listener() { showImageView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { ShowImageView(); } }); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { ShowImageView(); } }); } @Override protected void onResume() { super.onResume(); LogUtils.d("--->ShowImageActivity onResume"); } @Override protected void onPause() { super.onPause(); LogUtils.d("--->ShowImageActivity onPause"); } @Override protected void onDestroy() { super.onDestroy(); LogUtils.d("--->ShowImageActivity onDestroy"); } private class ExampleSpringListener implements SpringListener { @Override public void onSpringUpdate(Spring spring) { double CurrentValue = spring.getCurrentValue(); float mappedValue = (float) SpringUtil.mapValueFromRangeToRange(CurrentValue, 0, 1, 1, size); float mapy = (float) SpringUtil.mapValueFromRangeToRange(CurrentValue, 0, 1, 1, size_h); showImageView.setScaleX(mappedValue); showImageView.setScaleY(mapy); if (CurrentValue == 1) { // showImageView.setVisibility(View.GONE); } } @Override public void onSpringAtRest(Spring spring) { } @Override public void onSpringActivate(Spring spring) { } @Override public void onSpringEndStateChange(Spring spring) { } } //实现效果 private void MoveView() { ObjectAnimator.ofFloat(MainView, "alpha", 0.8f).setDuration(0).start(); MainView.setVisibility(View.VISIBLE); AnimatorSet set = new AnimatorSet(); set.playTogether( ObjectAnimator.ofFloat(showImageView, "translationX", tx).setDuration(200), ObjectAnimator.ofFloat(showImageView, "translationY", ty).setDuration(200), ObjectAnimator.ofFloat(MainView, "alpha", 1).setDuration(200) ); set.addListener(new Animator.AnimatorListener() { @Override public void onAnimationStart(Animator animator) { } @Override public void onAnimationEnd(Animator animator) { showImageView.setScaleType(ImageView.ScaleType.FIT_XY); spring.setEndValue(1); } @Override public void onAnimationCancel(Animator animator) { } @Override public void onAnimationRepeat(Animator animator) { } }); set.start(); } //关闭页面 private void MoveBackView() { AnimatorSet set = new AnimatorSet(); set.playTogether( ObjectAnimator.ofFloat(showImageView, "translationX", to_x).setDuration(200), ObjectAnimator.ofFloat(showImageView, "translationY", to_y).setDuration(200) ); set.addListener(new Animator.AnimatorListener() { @Override public void onAnimationStart(Animator animator) { } @Override public void onAnimationEnd(Animator animator) { finish(); } @Override public void onAnimationCancel(Animator animator) { } @Override public void onAnimationRepeat(Animator animator) { } }); set.start(); } //具体动画处理类 private void ShowImageView() { if (spring.getEndValue() == 0) { //弹动摩擦力 spring.setSpringConfig(SpringConfig.fromOrigamiTensionAndFriction(300, 5)); //动画结束后出现的位置 tx = 0; ty = Height / 2 - (imageWidgetInfoObj.y + img_h + 600); MoveView(); return; } spring.setSpringConfig(SpringConfig.fromOrigamiTensionAndFriction(1, 5)); spring.setEndValue(0); new Handler().post(new Runnable() { public void run() { MoveBackView(); } }); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { showImageView.setVisibility(View.VISIBLE); ShowImageView(); } return true; } }</code></pre> <p>大致流程：<br> 1.在 init（）获取了屏幕信息，上一个类传来的参数，以及对坐标点进行了一些计算 ,然后用Handler来启动动画的效果</p> <p>2.ShowImageView()处理了动画的实现，（动画效果是<code>compile 'com.非死book.rebound:rebound:0.3.8'</code> 实现的，这边不做教程了给出传送门：<a href="/misc/goto?guid=4958822653952750826">http://非死book.github.io/rebound/</a>）</p> <p>总结：</p> <p>总体实现并不是太难，因为有框架的关系，使得复杂的动画部分不用自己去写，调用下在回调里做业务就行，这里补充下一些过程中用到的技术点</p> <p>1.图片的缩放模式：<a href="/misc/goto?guid=4959670837799118701">http://blog.csdn.net/encienqi/article/details/7913262</a></p> <p>2.Layout常用的属性：<a href="/misc/goto?guid=4959670837876698642">http://blog.csdn.net/richway2010/article/details/6587842</a></p> <p>这个例子只是例子，部分坐标和样式是写死的，如果要运用到实际项目中还是要些许就该，在操作的过程中还对加载多图片进行了测试，暂未发生OOM的情况，补上内存使用情况图（一直很稳定）</p> <p><img alt="这里写图片描述" src="https://simg.open-open.com/show/bbcb3f347bd74c2e0af922d78a0d0392.png"></p> <p>代码地址：<a href="/misc/goto?guid=4959670837961584257">https://github.com/ddwhan0123/BlogSample/tree/master/ImitateWeChatImage</a><br> 源码下载地址：<a href="/misc/goto?guid=4959670838042357685">https://github.com/ddwhan0123/BlogSample/blob/master/ImitateWeChatImage/ImitateWeChatImage.zip?raw=true</a></p> <p>来自： <a href="/misc/goto?guid=4959670838112791900" rel="nofollow">http://blog.csdn.net/ddwhan0123/article/details/51143191</a></p>