Android属性动画实现炫酷的登录界面
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:
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.jb51.net/201607/yuanma/LoginProject(jb51.net).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我们。