本文将带你了解Android应用开发之图形与动画在Android中的实现，希望本文对大家学Android有所帮助

1、简单图形的绘制
        Java代码  canvas.drawColor(Color.BLUE);    Paint paint = new Paint();  paint.setColor(Color.RED);  canvas.drawRect(10, 10, 110, 110, paint);  canvas.drawText("This is text", 10, 130, paint);    RectF rf1 = new RectF(10, 130, 110, 230);  canvas.drawArc(rf1, 0, 45, true, paint);  canvas.drawLine(150, 10, 250, 110, paint);  RectF rf2 = new RectF(150, 130, 250, 230);  canvas.drawOval(rf2, paint);          canvas.drawColor(Color.BLUE);

        Paint paint = new Paint();
        paint.setColor(Color.RED);
        canvas.drawRect(10, 10, 110, 110, paint);
        canvas.drawText("This is text", 10, 130, paint);

        RectF rf1 = new RectF(10, 130, 110, 230);
        canvas.drawArc(rf1, 0, 45, true, paint);
        canvas.drawLine(150, 10, 250, 110, paint);
        RectF rf2 = new RectF(150, 130, 250, 230);
        canvas.drawOval(rf2, paint);

2、自定义动画的播放
  Android中主要有两种动画模式，一种是tweenedanimation（渐变动画），即通过对场景的对象不断做图像变换产生动画效果；另一种是framebyframe（帧动画），即按照顺序播放事先配置好的动画帧。下面主要是渐变动画的应用。
  首先创建动画文件donghuaanim.xml:
  Xml代码  <?xml version="1.0" encoding="utf-8"?>  <set xmlns:android="//schemas.android.com/apk/res/android">      <!-- 透明度变换 -->      <alpha          android:fromAlpha="0.1"          android:toAlpha="1.0"          android:duration="2000"/>        <!-- 尺寸变换 -->      <scale          android:interpolator="@android:anim/accelerate_decelerate_interpolator"          android:fromXScale="0.0"          android:toXScale="1.4"          android:fromYScale="0.0"          android:toYScale="1.4"          android:pivotX="50%"          android:pivotY="50%"          android:fillAfter="false"          android:duration="3000"/>        <!-- 位置变换 -->      <translate          android:fromXDelta="30"          android:toXDelta="0"          android:fromYDelta="30"          android:toYDelta="50"          android:duration="4000"/>        <!-- 旋转变换 -->      <rotate          android:interpolator="@android:anim/accelerate_decelerate_interpolator"          android:fromDegrees="0"          android:toDegrees="+350"          android:pivotX="50%"          android:pivotY="50%"          android:duration="5000"/>    </set>  <?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="//schemas.android.com/apk/res/android">
    <!-- 透明度变换 -->
    <alpha
        android:fromAlpha="0.1"
        android:toAlpha="1.0"
        android:duration="2000"/>

    <!-- 尺寸变换 -->
    <scale
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
        android:fromXScale="0.0"
        android:toXScale="1.4"
        android:fromYScale="0.0"
        android:toYScale="1.4"
        android:pivotX="50%"
        android:pivotY="50%"
        android:fillAfter="false"
        android:duration="3000"/>

    <!-- 位置变换 -->
    <translate
        android:fromXDelta="30"
        android:toXDelta="0"
        android:fromYDelta="30"
        android:toYDelta="50"
        android:duration="4000"/>

    <!-- 旋转变换 -->
    <rotate
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
        android:fromDegrees="0"
        android:toDegrees="+350"
        android:pivotX="50%"
        android:pivotY="50%"
        android:duration="5000"/>

</set>
  添加布局文件donghua_xml.xml:
  Xml代码  <?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="//schemas.android.com/apk/res/android"      android:orientation="vertical"      android:layout_width="match_parent"      android:layout_height="match_parent">        <ImageView          android:layout_width="fill_parent"          android:layout_height="fill_parent"          android:id="@+id/imageView"          android:src="@mipmap/image"/>    </LinearLayout>  <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="//schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:id="@+id/imageView"
        android:src="@mipmap/image"/>

</LinearLayout>
  添加DonghuaActivity.java文件:
  Java代码  package xiao.fuyan.testapp;    import android.app.Activity;  import android.os.Bundle;  import android.view.animation.Animation;  import android.view.animation.AnimationUtils;  import android.widget.ImageView;    /**  * Created by xiao on 2017/1/10.  */  public class DonghuaActivity extends Activity {      Animation animation;      ImageView imageView;        @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.donghua_xml);            animation = AnimationUtils.loadAnimation(this, R.anim.donghuaanim);            imageView = (ImageView) findViewById(R.id.imageView);          imageView.startAnimation(animation);      }  }  package xiao.fuyan.testapp;

import android.app.Activity;
import android.os.Bundle;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;

/**
 * Created by xiao on 2017/1/10.
 */
public class DonghuaActivity extends Activity {
    Animation animation;
    ImageView imageView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.donghua_xml);

        animation = AnimationUtils.loadAnimation(this, R.anim.donghuaanim);

        imageView = (ImageView) findViewById(R.id.imageView);
        imageView.startAnimation(animation);
    }
}    

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