溫馨提示×
您好，登錄后才能下訂單哦！
點擊 登錄注冊 即表示同意《億速云用戶服務條款》
您好，登錄后才能下訂單哦！
本文實例講述了Android開發實現圖片平移、縮放、倒影及旋轉功能的方法。分享給大家供大家參考，具體如下：
解析：
1）根據原來的圖片創建新的圖片
Bitmap modBm = Bitmap.createBitmap(bm.getWidth()+20, bm.getHeight()+20, bm.getConfig());
2）設置到畫布
Canvas canvas = new Canvas(modBm);
3）使用矩陣進行平移…
Matrix matrix = new Matrix(); matrix.setRotate(90, bm.getWidth()/2, bm.getHeight()/2);
4）把改變后圖片設置到
canvas.drawBitmap(bm, matrix, paint); imageView2.setImageBitmap(modBm);
示例代碼：
1、平移：
public class TranslateImageActivity extends Activity {
private ImageView imageView1;
private ImageView imageView2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image_rotate);
initViews();
}
private void initViews() {
imageView1 = (ImageView) findViewById(R.id.imageView1);
imageView2 = (ImageView) findViewById(R.id.imageView2);
Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.mm0);
imageView1.setImageBitmap(bm);
Bitmap modBm = Bitmap.createBitmap(bm.getWidth()+20, bm.getHeight()+20, bm.getConfig());
Canvas canvas = new Canvas(modBm);
Paint paint = new Paint();
paint.setColor(Color.BLACK);
paint.setAntiAlias(true);
Matrix matrix = new Matrix();
//matrix.setRotate(90, bm.getWidth()/2, bm.getHeight()/2);
matrix.setTranslate(20, 20);
matrix.postTranslate(20, 20);
canvas.drawBitmap(bm, matrix, paint);
imageView2.setImageBitmap(modBm);
}
}
2、縮放
public class ScaleImageActivity extends BaseActivity {
private static final int DOUBLE = 2;
private ImageView iv1, iv2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scale_iamge);
iv1 = (ImageView) findViewById(R.id.imageView1);
iv2 = (ImageView) findViewById(R.id.imageView2);
Bitmap b1 = BitmapFactory.decodeResource(getResources(), R.drawable.p1);
iv1.setImageBitmap(b1);
Bitmap b2 = Bitmap.createBitmap(b1.getWidth()*DOUBLE, b1.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(b2);
Matrix matrix = new Matrix();
matrix.setValues(new float[]{
DOUBLE * 1.0f, 0, 0,//x
0, 1.0f, 0,//y
0, 0, 1.0f//z
});
canvas.drawBitmap(b1, matrix, new Paint());
iv2.setImageBitmap(b2);
}
}
3、倒影
public class ShadeImageActivity extends Activity {
private ImageView imageView1;
private ImageView imageView2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image_rotate);
initViews();
}
private void initViews() {
imageView1 = (ImageView) findViewById(R.id.imageView1);
imageView2 = (ImageView) findViewById(R.id.imageView2);
Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.mm3);
imageView1.setImageBitmap(bm);
Bitmap modBm = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(), bm.getConfig());
Canvas canvas = new Canvas(modBm);
Paint paint = new Paint();
paint.setColor(Color.BLACK);
paint.setAntiAlias(true);
Matrix matrix = new Matrix();
//matrix.setRotate(90, bm.getWidth()/2, bm.getHeight()/2);
//matrix.setTranslate(20, 20);
//鏡子效果
matrix.setScale(1, -1);
matrix.postTranslate(0, bm.getHeight());
canvas.drawBitmap(bm, matrix, paint);
imageView2.setImageBitmap(modBm);
}
}
4、旋轉
public class RotateImageActivity extends Activity {
private ImageView imageView1;
private ImageView imageView2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image_rotate);
initViews();
}
private void initViews() {
imageView1 = (ImageView) findViewById(R.id.imageView1);
imageView2 = (ImageView) findViewById(R.id.imageView2);
Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.mm0);
imageView1.setImageBitmap(bm);
Bitmap modBm = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(), bm.getConfig());
Canvas canvas = new Canvas(modBm);
Paint paint = new Paint();
paint.setColor(Color.BLACK);
paint.setAntiAlias(true);
Matrix matrix = new Matrix();
matrix.setRotate(90, bm.getWidth()/2, bm.getHeight()/2);
canvas.drawBitmap(bm, matrix, paint);
imageView2.setImageBitmap(modBm);
}
}
更多關于Android相關內容感興趣的讀者可查看本站專題：《Android圖形與圖像處理技巧總結》、《Android開發入門與進階教程》、《Android調試技巧與常見問題解決方法匯總》、《Android基本組件用法總結》、《Android視圖View技巧總結》、《Android布局layout技巧總結》及《Android控件用法總結》
希望本文所述對大家Android程序設計有所幫助。
免責聲明：本站發布的內容（圖片、視頻和文字）以原創、轉載和分享為主，文章觀點不代表本網站立場，如果涉及侵權請聯系站長郵箱：is@yisu.com進行舉報，并提供相關證據，一經查實，將立刻刪除涉嫌侵權內容。
