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Android属性动画实现炫酷的登录界面

2019-12-12 05:51:37
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我们聊聊我们常写的登录界面,这个界面我相信很多人都写过,而且也没什么难度,但是如果要实现比较不一般的效果,那就要花点心思了,先看看项目的效果吧:

这里写图片描述

我一直都不知道怎么在编辑框连设置图片大小,所以这个图不怎么样适配编辑框了,大家先凑合着看看。

我先讲讲思路,当我们输入完账号跟密码之后,点击登录,那这个输入框就慢慢的消失,在消失后,紧接着就出现这个进度的界面。

思路有了,那我们就开始编码了:
新建一个项目,然后系统生成了一个MainActivity.java文件和activity_main.xml文件。先在activity_main里面操作:
代码如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:background="#7adfb8"  tools:context=".MainActivity" >  <include    android:id="@+id/main_title"    layout="@layout/title_layout" />  <LinearLayout    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:layout_below="@+id/main_title"    android:orientation="vertical" >    <ImageView      android:layout_width="55dip"      android:layout_height="55dip"      android:layout_gravity="center_horizontal"      android:src="@drawable/project_detail_cir" />    <TextView      android:layout_width="fill_parent"      android:layout_height="wrap_content"      android:layout_marginTop="5dip"      android:gravity="center"      android:text="FIREFLY FOREST"      android:textColor="#ffffff"      android:textSize="24sp" />    <TextView      android:layout_width="fill_parent"      android:layout_height="wrap_content"      android:gravity="center"      android:text="SHOW YOUR IDEAS"      android:textColor="#ffffff"      android:textSize="16sp" />  </LinearLayout>  <RelativeLayout    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:layout_centerInParent="true" >    <include      android:id="@+id/input_layout"      android:layout_width="match_parent"      android:layout_height="130dip"      layout="@layout/input_layout" />    <include      android:id="@+id/layout_progress"      android:layout_width="match_parent"      android:layout_height="130dip"      layout="@layout/layout_progress"      android:visibility="gone" />    <TextView      android:id="@+id/main_btn_login"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:layout_below="@+id/input_layout"      android:layout_centerInParent="true"      android:layout_marginTop="15dip"      android:background="@drawable/text_bg"      android:gravity="center"      android:paddingBottom="2dip"      android:paddingLeft="15dip"      android:paddingRight="15dip"      android:paddingTop="2dip"      android:text="Login"      android:textColor="#ffffff"      android:textSize="20sp" />  </RelativeLayout></RelativeLayout>

这里我引用外面的三个布局,再加上一个TextView写的按钮,标题所引用的文件:
title_layout.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="50dip"  android:gravity="center_vertical"  android:padding="10dip" >  <ImageView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:src="@drawable/back" />  <TextView     android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:textColor="#ffffff"    android:layout_alignParentRight="true"    android:layout_centerVertical="true"    android:textSize="20sp"    android:text="Sign up"    /></RelativeLayout>

输入框引用的文件:input_layout.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:orientation="vertical" >  <LinearLayout    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:layout_margin="20dip"    android:background="@drawable/radius_drawable_bg"    android:orientation="vertical"    android:padding="10dip" >    <LinearLayout      android:id="@+id/input_layout_name"      android:layout_width="match_parent"      android:layout_height="wrap_content"      android:gravity="center_vertical"      android:orientation="horizontal" >      <ImageView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/paw_code" />      <EditText        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_marginLeft="10dip"        android:background="#00000000"        android:hint="账号/用户名/邮箱"        android:padding="5dip"        android:textSize="16sp" />    </LinearLayout>    <View      android:layout_width="match_parent"      android:layout_height="1px"      android:layout_marginBottom="5dip"      android:layout_marginTop="5dip"      android:background="#eeeeee" />    <LinearLayout      android:id="@+id/input_layout_psw"      android:layout_width="match_parent"      android:layout_height="wrap_content"      android:gravity="center_vertical"      android:orientation="horizontal" >      <ImageView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/paw_left" />      <EditText        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_marginLeft="10dip"        android:background="#00000000"        android:hint="密码"        android:inputType="textPassword"        android:padding="5dip"        android:textSize="16sp" />    </LinearLayout>  </LinearLayout></LinearLayout>

还有一个加载进度的界面:layout_progress.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:orientation="vertical" >  <LinearLayout    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_gravity="center"    android:layout_margin="20dip"    android:background="@drawable/rotate_layout_bg"    android:orientation="vertical"    android:padding="10dip" >    <ProgressBar      android:id="@+id/progressBar2"      android:layout_width="wrap_content"       android:layout_margin="10dip"      android:layout_height="wrap_content" />  </LinearLayout></LinearLayout>

当然,我这里还用到了drawable文件:radius_drawable_bg.xml,这个文件是输入框的圆角矩形背景:

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android" >  <corners android:radius="5dip"/>  <solid android:color="#ffffff"/></shape>

还有进度的白色圆形背景:rotate_layout_bg.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"  android:shape="oval" >  <corners android:radius="60dip" />  <solid android:color="#ffffff" /></shape>

除此之外,还有一个按钮的描边背景text_bg.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"  >  <corners android:radius="50dip"/>  <stroke    android:width="1dip"    android:color="#ffffff" /></shape>

至此,我们的前期界面的编写就完成了,不难,很容易理解,下面开始处理MainActivity.java文件,先看看这里的初始化操作;

  private TextView mBtnLogin;  private View progress;  private View mInputLayout;  private float mWidth, mHeight;  private LinearLayout mName, mPsw;  private void initView() {    mBtnLogin = (TextView) findViewById(R.id.main_btn_login);    progress = findViewById(R.id.layout_progress);    mInputLayout = findViewById(R.id.input_layout);    mName = (LinearLayout) findViewById(R.id.input_layout_name);    mPsw = (LinearLayout) findViewById(R.id.input_layout_psw);    mBtnLogin.setOnClickListener(this);  }

这里主要就是加载控件了,不需要多解释,重点看看动画的处理:

/**   * 输入框的动画效果   *    * @param view   *      控件   * @param w   *      宽   * @param h   *      高   */  private void inputAnimator(final View view, float w, float h) {    AnimatorSet set = new AnimatorSet();    ValueAnimator animator = ValueAnimator.ofFloat(0, w);    animator.addUpdateListener(new AnimatorUpdateListener() {      @Override      public void onAnimationUpdate(ValueAnimator animation) {        float value = (Float) animation.getAnimatedValue();        ViewGroup.MarginLayoutParams params = (MarginLayoutParams) view            .getLayoutParams();        params.leftMargin = (int) value;        params.rightMargin = (int) value;        view.setLayoutParams(params);      }    });    ObjectAnimator animator2 = ObjectAnimator.ofFloat(mInputLayout,        "scaleX", 1f, 0.5f);    set.setDuration(1000);    set.setInterpolator(new AccelerateDecelerateInterpolator());    set.playTogether(animator, animator2);    set.start();    set.addListener(new AnimatorListener() {      @Override      public void onAnimationStart(Animator animation) {      }      @Override      public void onAnimationRepeat(Animator animation) {      }      @Override      public void onAnimationEnd(Animator animation) {        /**         * 动画结束后,先显示加载的动画,然后再隐藏输入框         */        progress.setVisibility(View.VISIBLE);        progressAnimator(progress);        mInputLayout.setVisibility(View.INVISIBLE);      }      @Override      public void onAnimationCancel(Animator animation) {      }    });  }

这里用到的知识点还是挺多,例如:属性动画容器、插值器、属性动画的监听、动态的设置控件的相对位置;一开始可能不容易理解,没关系,以后我会在博客里都讲到。我就说一下这里的思路;
当我们开启这个动画的时候,先是设置相对位置,同时处理在X轴的缩放,然后我们监听到的生命周期,并且在动画结束的时候,隐藏当前布局,开启另外一个布局的显示动画,看到另外一个动画:

/**   * 出现进度动画   *    * @param view   */  private void progressAnimator(final View view) {    PropertyValuesHolder animator = PropertyValuesHolder.ofFloat("scaleX",        0.5f, 1f);    PropertyValuesHolder animator2 = PropertyValuesHolder.ofFloat("scaleY",        0.5f, 1f);    ObjectAnimator animator3 = ObjectAnimator.ofPropertyValuesHolder(view,        animator, animator2);    animator3.setDuration(1000);    animator3.setInterpolator(new JellyInterpolator());    animator3.start();  }

其实这里的套路是一样的但是不同的是,这里我用到了自己的插值器;
JellyInterpolator.java:

public class JellyInterpolator extends LinearInterpolator {  private float factor;  public JellyInterpolator() {    this.factor = 0.15f;  }  @Override  public float getInterpolation(float input) {    return (float) (Math.pow(2, -10 * input)        * Math.sin((input - factor / 4) * (2 * Math.PI) / factor) + 1);  }}

让动画更有动感。下面我贴上MainActivity的全部代码;

public class MainActivity extends Activity implements OnClickListener {  private TextView mBtnLogin;  private View progress;  private View mInputLayout;  private float mWidth, mHeight;  private LinearLayout mName, mPsw;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    requestWindowFeature(Window.FEATURE_NO_TITLE);    setContentView(R.layout.activity_main);    initView();  }  private void initView() {    mBtnLogin = (TextView) findViewById(R.id.main_btn_login);    progress = findViewById(R.id.layout_progress);    mInputLayout = findViewById(R.id.input_layout);    mName = (LinearLayout) findViewById(R.id.input_layout_name);    mPsw = (LinearLayout) findViewById(R.id.input_layout_psw);    mBtnLogin.setOnClickListener(this);  }  @Override  public void onClick(View v) {    // 计算出控件的高与宽    mWidth = mBtnLogin.getMeasuredWidth();    mHeight = mBtnLogin.getMeasuredHeight();    // 隐藏输入框    mName.setVisibility(View.INVISIBLE);    mPsw.setVisibility(View.INVISIBLE);    inputAnimator(mInputLayout, mWidth, mHeight);  }  /**   * 输入框的动画效果   *    * @param view   *      控件   * @param w   *      宽   * @param h   *      高   */  private void inputAnimator(final View view, float w, float h) {    AnimatorSet set = new AnimatorSet();    ValueAnimator animator = ValueAnimator.ofFloat(0, w);    animator.addUpdateListener(new AnimatorUpdateListener() {      @Override      public void onAnimationUpdate(ValueAnimator animation) {        float value = (Float) animation.getAnimatedValue();        ViewGroup.MarginLayoutParams params = (MarginLayoutParams) view            .getLayoutParams();        params.leftMargin = (int) value;        params.rightMargin = (int) value;        view.setLayoutParams(params);      }    });    ObjectAnimator animator2 = ObjectAnimator.ofFloat(mInputLayout,        "scaleX", 1f, 0.5f);    set.setDuration(1000);    set.setInterpolator(new AccelerateDecelerateInterpolator());    set.playTogether(animator, animator2);    set.start();    set.addListener(new AnimatorListener() {      @Override      public void onAnimationStart(Animator animation) {      }      @Override      public void onAnimationRepeat(Animator animation) {      }      @Override      public void onAnimationEnd(Animator animation) {        /**         * 动画结束后,先显示加载的动画,然后再隐藏输入框         */        progress.setVisibility(View.VISIBLE);        progressAnimator(progress);        mInputLayout.setVisibility(View.INVISIBLE);      }      @Override      public void onAnimationCancel(Animator animation) {      }    });  }  /**   * 出现进度动画   *    * @param view   */  private void progressAnimator(final View view) {    PropertyValuesHolder animator = PropertyValuesHolder.ofFloat("scaleX",        0.5f, 1f);    PropertyValuesHolder animator2 = PropertyValuesHolder.ofFloat("scaleY",        0.5f, 1f);    ObjectAnimator animator3 = ObjectAnimator.ofPropertyValuesHolder(view,        animator, animator2);    animator3.setDuration(1000);    animator3.setInterpolator(new JellyInterpolator());    animator3.start();  }}

至此,所有的操作已经完成了,运行项目后点击登录按钮,就可以看到效果了。

源码下载:http://xiazai.VeVB.COm/201607/yuanma/LoginProject(VeVB.COm).rar

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持武林网。

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