android6.0 多用户 csdn,Android ScaleDrawable

顾名思义，Android ScaleDrawable实现一个drawable的缩放。写一个例子。

一个线性布局，垂直放几个ImageView，然后依次缩放若干个ScaleDrawable。

布局文件：

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

tools:context="zhangphil.app.MainActivity">

android:layout_width="match_parent"

android:layout_height="100dp"

android:id="@+id/imageView1" />

android:layout_width="match_parent"

android:layout_height="100dp"

android:id="@+id/imageView2" />

android:layout_width="match_parent"

android:layout_height="100dp"

android:id="@+id/imageView3" />

android:layout_width="match_parent"

android:layout_height="100dp"

android:id="@+id/imageView4" />

Java代码：

package zhangphil.app;

import android.graphics.Color;

import android.graphics.drawable.ColorDrawable;

import android.graphics.drawable.ScaleDrawable;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.Gravity;

import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

ColorDrawable drawable1=new ColorDrawable(Color.RED);

drawable1.setLevel(1);

ImageView image1= (ImageView) findViewById(R.id.imageView1);

image1.setImageDrawable(drawable1);

ColorDrawable drawable2=new ColorDrawable(Color.YELLOW);

drawable2.setLevel(1);

ScaleDrawable sd2 = new ScaleDrawable(drawable2, Gravity.LEFT,0.1f,0.0f);

ImageView image2= (ImageView) findViewById(R.id.imageView2);

image2.setImageDrawable(sd2);

ColorDrawable drawable3=new ColorDrawable(Color.BLUE);

drawable3.setLevel(1);

ScaleDrawable sd3 = new ScaleDrawable(drawable3, Gravity.LEFT,0.2f,0.0f);

ImageView image3= (ImageView) findViewById(R.id.imageView3);

image3.setImageDrawable(sd3);

ColorDrawable drawable4=new ColorDrawable(Color.GREEN);

drawable4.setLevel(1);

ScaleDrawable sd4 = new ScaleDrawable(drawable4, Gravity.LEFT,0.3f,0.0f);

ImageView image4= (ImageView) findViewById(R.id.imageView4);

image4.setImageDrawable(sd4);

}

}

代码运行结果：

以上ScaleDrawable没有让drawable的高度缩放，只缩放宽度。

附录：

1，《Android ImageView的setImageLevel和level-list使用简介》链接：http://blog.youkuaiyun.com/zhangphil/article/details/48936209