Android基础入门教程——8.1.2 Android中的13种Drawable

本节引言：

本节我们继续来学习Android中的Drawable资源，上一节我们学习了：
ColorDrawable；NinePatchDrawable；
ShapeDrawable；GradientDrawable！这四个Drawable~
而本节我们继续来学习接下来的五个Drawable，他们分别是：
BitmapDrawable；InsertDrawable；ClipDrawable；
RotateDrawable；AnimationDrawable!
还是贴下13种Drawable的导图：



好的，开始本节内容~

1.BitmapDrawable

对Bitmap的一种封装,可以设置它包装的bitmap在BitmapDrawable区域中的绘制方式,有:
平铺填充,拉伸填或保持图片原始大小!以<bitmap>为根节点!
可选属性如下：

src:图片资源~

antialias:是否支持抗锯齿

filter:是否支持位图过滤,支持的话可以是图批判显示时比较光滑

dither:是否对位图进行抖动处理

gravity:若位图比容器小,可以设置位图在容器中的相对位置

tileMode:指定图片平铺填充容器的模式,设置这个的话,gravity属性会被忽略,有以下可选值:
disabled(整个图案拉伸平铺),clamp(原图大小),
repeat(平铺),mirror(镜像平铺)

对应的效果图：

<?xml version="1.0" encoding="utf-8"?>
<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
android:dither="true"
android:src="@drawable/ic_launcher"
android:tileMode="mirror" />

BitmapDrawable bitDrawable = new BitmapDrawable(bitmap);
bitDrawable.setDither(true);
bitDrawable.setTileModeXY(TileMode.MIRROR,TileMode.MIRROR);

2.InsetDrawable

<?xml version="1.0" encoding="utf-8"?>
<inset xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="@drawable/test1"
android:insetBottom="10dp"
android:insetLeft="10dp"
android:insetRight="10dp"
android:insetTop="10dp" />

InsetDrawable insetDrawable = new InsetDrawable(getResources()
.getDrawable(R.drawable.test1), 10, 10, 10, 10);

3.ClipDrawable

<?xml version="1.0" encoding="utf-8"?>
<clip xmlns:android="http://schemas.android.com/apk/res/android"
android:clipOrientation="horizontal"
android:drawable="@mipmap/ic_bg_meizi"
android:gravity="left" />

<LinearLayout 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:orientation="vertical">

<ImageView
android:id="@+id/img_show"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/clip_bg" />

</LinearLayout>

public class MainActivity extends AppCompatActivity {

private ImageView img_show;
private ClipDrawable cd;
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (msg.what == 0x123) {
cd.setLevel(cd.getLevel() + 500);
}
}
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
img_show = (ImageView) findViewById(R.id.img_show);
// 核心实现代码
cd = (ClipDrawable) img_show.getDrawable();
final Timer timer = new Timer();
timer.schedule(new TimerTask() {
@Override
public void run() {
handler.sendEmptyMessage(0x123);
if (cd.getLevel() >= 10000) {
timer.cancel();
}
}
}, 0, 300);
}
}

4.RotateDrawable

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:drawable="@mipmap/ic_launcher"
android:fromDegrees="-180"
android:pivotX="50%"
android:pivotY="50%" />

public class MainActivity extends AppCompatActivity {

private ImageView img_show;
private RotateDrawable cd;
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (msg.what == 0x123) {
if (cd.getLevel() >= 10000)
Toast.makeText(MainActivity.this, "转完了~",
Toast.LENGTH_LONG).show();
cd.setLevel(cd.getLevel() + 400);
}
}
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
img_show = (ImageView) findViewById(R.id.img_show);
// 核心实现代码
cd = (RotateDrawable) img_show.getDrawable();
final Timer timer = new Timer();
timer.schedule(new TimerTask() {
@Override
public void run() {
handler.sendEmptyMessage(0x123);
if (cd.getLevel() >= 10000) {
timer.cancel();
}
}
}, 0, 100);
}
}

5.AnimationDrawable

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="false">

<item
android:drawable="@mipmap/ic_pull_to_refresh_loading01"
android:duration="100" />

<item
android:drawable="@mipmap/ic_pull_to_refresh_loading02"
android:duration="100" />
<item
android:drawable="@mipmap/ic_pull_to_refresh_loading03"
android:duration="100" />
<item
android:drawable="@mipmap/ic_pull_to_refresh_loading04"
android:duration="100" />
<item
android:drawable="@mipmap/ic_pull_to_refresh_loading05"
android:duration="100" />
<item
android:drawable="@mipmap/ic_pull_to_refresh_loading06"
android:duration="100" />

</animation-list>

public class MainActivity extends AppCompatActivity {

private ImageView img_show;
private AnimationDrawable ad;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
img_show = (ImageView) findViewById(R.id.img_show);
// 核心实现代码
ad = (AnimationDrawable) img_show.getDrawable();
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
ad.start();
}
}, 300);
}
}