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<h1 class="post-title" itemprop="name headline">
<a class="post-title-link" href="/2017/02/15/BottomSheet和BottomSheetDialog的使用方法/" itemprop="url">
BottomSheet和BottomSheetDialog的使用方法
</a>
</h1>
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<span class="post-time">
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<span class="post-meta-item-text">发表于</span>
<time itemprop="dateCreated" datetime="2017-02-15T22:32:14+08:00" content="2017-02-15">
2017-02-15
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<div class="post-body" itemprop="articleBody">
<h3 id="BottomSheet"><a href="#BottomSheet" class="headerlink" title="BottomSheet"></a>BottomSheet</h3><ol>
<li><p>在布局文件的CoordinatorLayout标签内部添加NestedScrollView标签,代码如下</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div></pre></td><td class="code"><pre><div class="line"><android.support.design.widget.CoordinatorLayout</div><div class="line"> android:layout_width="match_parent"</div><div class="line"> android:layout_height="match_parent"</div><div class="line"> android:fitsSystemWindows="true"</div><div class="line"> tools:context="com.cjt.employment.ui.activity.UserEditActivity"></div><div class="line"> </div><div class="line"> <android.support.v4.widget.NestedScrollView</div><div class="line"> android:id="@+id/bottom_sheet"</div><div class="line"> android:layout_width="match_parent"</div><div class="line"> android:layout_height="wrap_content"</div><div class="line"> app:behavior_hideable="true"</div><div class="line"> //peekHeight为BottomSheet的高度</div><div class="line"> app:behavior_peekHeight="100dp"</div><div class="line"> app:layout_behavior="@string/bottom_sheet_behavior"</div><div class="line"> ></div><div class="line"> //标签内部放BottomSheet控件</div><div class="line"> <TextView</div><div class="line"> android:layout_width="match_parent"</div><div class="line"> android:layout_height="wrap_content"</div><div class="line"> android:text="拍照" /></div><div class="line"> </div><div class="line"> </android.support.v4.widget.NestedScrollView></div><div class="line"></android.support.design.widget.CoordinatorLayout></div></pre></td></tr></table></figure>
</li>
<li><p>在Java代码中获取到BottomSheetBehavior</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div></pre></td><td class="code"><pre><div class="line">BottomSheet bottomSheet = findViewById(R.id.bottom_sheet);</div><div class="line">BottomSheetBehavior behavior = BottomSheetBehavior.from(bottomSheet);</div><div class="line">//设置监听事件,可以根据BottomSheet滑动状态做出相应事件</div><div class="line"> behavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {</div><div class="line"> @Override</div><div class="line"> public void onStateChanged(@NonNull View bottomSheet, int newState) {</div><div class="line"> //这里是bottomSheet 状态的改变,根据slideOffset可以做一些动画</div><div class="line"> Log.i("TAG", "newState--->" + newState);</div><div class="line"> }</div><div class="line"></div><div class="line"> @Override</div><div class="line"> public void onSlide(@NonNull View bottomSheet, float slideOffset) {</div><div class="line"> //这里是拖拽中的回调,根据slideOffset可以做一些动画</div><div class="line"> Log.i("TAG", "slideOffset=====》" + slideOffset);</div><div class="line"> }</div><div class="line"> });</div></pre></td></tr></table></figure>
</li>
<li><p>之后可以根据设置状态来更改显示状态</p>
</li>
</ol>
<ul>
<li>STATE_COLLAPSED: 关闭BottomSheets,显示peekHeight的高度,默认是0</li>
<li>STATE_DRAGGING: 用户拖拽Bottom Sheets时的状态</li>
<li>STATE_SETTLING: 当Bottom Sheets view释放时记录的状态。</li>
<li>STATE_EXPANDED: 当Bottom Sheets 展开的状态</li>
<li>STATE_HIDDEN: 当Bottom Sheets 隐藏的状态</li>
</ul>
<p>例如<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">behavior.setState(BottomSheetBehavior.STATE_HIDDEN);</div></pre></td></tr></table></figure></p>
<h3 id="BottomSheetDialog"><a href="#BottomSheetDialog" class="headerlink" title="BottomSheetDialog"></a>BottomSheetDialog</h3><ol>
<li>新建一个需要显示BottomSheetDialog的布局文件</li>
<li><p>在Java代码中创建一个BottomSheetDialog</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">BottomSheetDialog bottomSheetDialog = new BottomSheetDialog(this);</div></pre></td></tr></table></figure>
</li>
<li><p>通过LayoutInflater获取到布局文件</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">RelativeLayout relativeLayout = (RelativeLayout) LayoutInflater.from(this).inflate(R.layout.photo_bottomsheet,null);</div></pre></td></tr></table></figure>
</li>
<li><p>将获取到的布局文件设置到BottomSheetDialog</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">bottomSheetDialog.setContentView(relativeLayout);</div></pre></td></tr></table></figure>
</li>
<li><p>通过hide()和show()方法隐藏和显示BottomSheetDialog</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div></pre></td><td class="code"><pre><div class="line">bottomSheetDialog.hide();</div><div class="line">bottomSheetDialog.show();</div></pre></td></tr></table></figure>
</li>
</ol>
<h2 id="总结"><a href="#总结" class="headerlink" title="总结"></a>总结</h2><p>该文章只介绍BottomSheet和BottomSheetDialog的使用方法。</p>
<p>而BottomSheetDialog在显示的时候状态栏会变黑,影响美观,以后再去解决</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div></pre></td><td class="code"><pre><div class="line">//修改透明度使屏幕变暗的方法</div><div class="line"> WindowManager.LayoutParams lp1 = getWindow().getAttributes();</div><div class="line"> lp1.alpha = 1.0f;</div><div class="line"> getWindow().setAttributes(lp1);</div><div class="line"> getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);</div><div class="line"> behavior.setState(BottomSheetBehavior.STATE_HIDDEN);</div></pre></td></tr></table></figure>
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<h1 class="post-title" itemprop="name headline">
<a class="post-title-link" href="/2016/11/25/Activity四种启动方式/" itemprop="url">
Activity四种启动方式
</a>
</h1>
<div class="post-meta">
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<span class="post-meta-item-text">发表于</span>
<time itemprop="dateCreated" datetime="2016-11-25T22:43:55+08:00" content="2016-11-25">
2016-11-25
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<h5 id="Activity启动方式有四种,分别为:"><a href="#Activity启动方式有四种,分别为:" class="headerlink" title="Activity启动方式有四种,分别为:"></a>Activity启动方式有四种,分别为:</h5><ul>
<li>standard</li>
<li>singleTop</li>
<li>singleTask</li>
<li>singleInstance</li>
</ul>
<p>可以根据不同的应用场景来设置启动方式,从而避免重复创建的问题<br>可以在AndroidManifest.xml里对应的Avitity标签中设置启动方式</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div></pre></td><td class="code"><pre><div class="line"><activity </div><div class="line"> android:name=".MainActivity" </div><div class="line"> android:launchMode="standard" /></div></pre></td></tr></table></figure>
<h4 id="standard-默认启动方式"><a href="#standard-默认启动方式" class="headerlink" title="standard(默认启动方式)"></a>standard(默认启动方式)</h4><p>在这个模式下,都能创建一个新的实例在Task中,允许多个Avtivity叠加。即每次打开该Avtivity时候,不管Task中是否存在该Activity的实例,都会重新去创建一个新的实例放到栈顶。</p>
<h4 id="singleTop"><a href="#singleTop" class="headerlink" title="singleTop"></a>singleTop</h4><p>这个模式下允许多个实例,但是不允许多个Avtivity叠加,即如果打开该Activity时候栈顶不是该Activity的实例的话,就会新建一个实例放到栈顶,如果栈顶是该Activity的实例,就不会重新创建实例,而是调用其onNewIntent()方法。</p>
<h4 id="singleTask"><a href="#singleTask" class="headerlink" title="singleTask"></a>singleTask</h4><p>这个模式下Activity在Task中只能存在一个实例,当打开该Activity的时候Task中不存在该实例,就会创建一个新的实例放入栈顶,如果在Task中已经存在实例的情况下,就会将该实例其上的所有其他activity实例销毁掉,再调用该Avtivity的onNewIntent()。<br>如果在别的应用启动该Activity则会新建一个Task,并在该Task中启动该Avtivity,之后在该Activity启动的其他Activity都会在该Task中创建。</p>
<h4 id="singleInstance"><a href="#singleInstance" class="headerlink" title="singleInstance"></a>singleInstance</h4><p>这个模式下Task只能存在该Activity唯一个实例,在其他Activity中启动该Activity会新建一个Task启动该Activity,同时该Task不允许存在其他Activity的实例。</p>
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Hello World
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2016-11-25
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<div class="post-body" itemprop="articleBody">
<p>Welcome to <a href="https://hexo.io/" target="_blank" rel="external">Hexo</a>! This is your very first post. Check <a href="https://hexo.io/docs/" target="_blank" rel="external">documentation</a> for more info. If you get any problems when using Hexo, you can find the answer in <a href="https://hexo.io/docs/troubleshooting.html" target="_blank" rel="external">troubleshooting</a> or you can ask me on <a href="https://github.com/hexojs/hexo/issues" target="_blank" rel="external">GitHub</a>.</p>
<h2 id="Quick-Start"><a href="#Quick-Start" class="headerlink" title="Quick Start"></a>Quick Start</h2><h3 id="Create-a-new-post"><a href="#Create-a-new-post" class="headerlink" title="Create a new post"></a>Create a new post</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">$ hexo new <span class="string">"My New Post"</span></div></pre></td></tr></table></figure>
<p>More info: <a href="https://hexo.io/docs/writing.html" target="_blank" rel="external">Writing</a></p>
<h3 id="Run-server"><a href="#Run-server" class="headerlink" title="Run server"></a>Run server</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">$ hexo server</div></pre></td></tr></table></figure>
<p>More info: <a href="https://hexo.io/docs/server.html" target="_blank" rel="external">Server</a></p>
<h3 id="Generate-static-files"><a href="#Generate-static-files" class="headerlink" title="Generate static files"></a>Generate static files</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">$ hexo generate</div></pre></td></tr></table></figure>
<p>More info: <a href="https://hexo.io/docs/generating.html" target="_blank" rel="external">Generating</a></p>
<h3 id="Deploy-to-remote-sites"><a href="#Deploy-to-remote-sites" class="headerlink" title="Deploy to remote sites"></a>Deploy to remote sites</h3><figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">$ hexo deploy</div></pre></td></tr></table></figure>
<p>More info: <a href="https://hexo.io/docs/deployment.html" target="_blank" rel="external">Deployment</a></p>
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