AndroidのResource - ClipDrawableサンプルコード

① my_clip.xml

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

② activity_main2.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="match_parent"
    android:orientation="vertical">
    <ImageView
        android:id="@+id/image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:scaleType="fitStart"
        android:src="@drawable/my_clip" />
</LinearLayout>

③ MainActivity.java

package com.example.liguofeng.drawablesample;

import android.graphics.drawable.ClipDrawable;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ImageView;

import java.util.Timer;
import java.util.TimerTask;
import android.os.Handler;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        ImageView imageview = (ImageView) findViewById(R.id.image);
        // ClipDrawable取得
        final ClipDrawable drawable = (ClipDrawable)
                imageview.getDrawable();
        final Handler handler = new Handler()
        {
            @Override
            public void handleMessage(Message msg)
            {
                // メッセージ取得
                if (msg.what == 0x1233)
                {
                    // ClipDrawableのlevel変更
                    drawable.setLevel(drawable.getLevel() + 200);
                }
            }
        };
        final Timer timer = new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                Message msg = new Message();
                msg.what = 0x1233;
                // メッセージ送信
                handler.sendMessage(msg);
                if (drawable.getLevel() >= 10000) {
                    // タイマー取り消し
                    timer.cancel();
                }
            }
        }, 0, 300);
    }
}