Android View转换成图片保存，,import java.

Android View转换成图片保存，,import java.

import java.io.File;  import java.io.FileOutputStream;  import android.os.Bundle;  import android.os.Environment;  import android.os.Handler;  import android.view.View;  import android.widget.Button;  import android.widget.TextView;  import android.app.Activity;  import android.graphics.Bitmap;  import android.graphics.Canvas;  import android.graphics.Color;  import android.graphics.Paint;  /**  * 把Android的一个View转换成图片保存  *   * */  public class MainActivity extends Activity {      @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_main);          final TextView tv = (TextView) findViewById(R.id.textView);          tv.setBackgroundColor(Color.GREEN);          // tv.setDrawingCacheEnabled(true);          final Runnable runnable = new Runnable() {              @Override              public void run() {                  viewSaveToImage(tv);              }          };          Button button = (Button) findViewById(R.id.button);          button.setOnClickListener(new View.OnClickListener() {              @Override              public void onClick(View v) {                  new Handler().post(runnable);              }          });      }      public void viewSaveToImage(View view) {          view.setDrawingCacheEnabled(true);          view.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_HIGH);          view.setDrawingCacheBackgroundColor(Color.WHITE);          // 把一个View转换成图片          Bitmap cachebmp = loadBitmapFromView(view);          // 添加水印          Bitmap bitmap = Bitmap.createBitmap(createWatermarkBitmap(cachebmp,                  "@ Zhang Phil"));          FileOutputStream fos;          try {              // 判断手机设备是否有SD卡              boolean isHasSDCard = Environment.getExternalStorageState().equals(                      android.os.Environment.MEDIA_MOUNTED);              if (isHasSDCard) {                  // SD卡根目录                  File sdRoot = Environment.getExternalStorageDirectory();                  File file = new File(sdRoot, "test.PNG");                  fos = new FileOutputStream(file);              } else                  throw new Exception("创建文件失败!");              bitmap.compress(Bitmap.CompressFormat.PNG, 90, fos);              fos.flush();              fos.close();          } catch (Exception e) {              e.printStackTrace();          }          view.destroyDrawingCache();      }      private Bitmap loadBitmapFromView(View v) {          int w = v.getWidth();          int h = v.getHeight();          Bitmap bmp = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);          Canvas c = new Canvas(bmp);          c.drawColor(Color.WHITE);          /** 如果不设置canvas画布为白色，则生成透明 */          v.layout(0, 0, w, h);          v.draw(c);          return bmp;      }      // 为图片target添加水印      private Bitmap createWatermarkBitmap(Bitmap target, String str) {          int w = target.getWidth();          int h = target.getHeight();          Bitmap bmp = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);          Canvas canvas = new Canvas(bmp);          Paint p = new Paint();          // 水印的颜色          p.setColor(Color.RED);          // 水印的字体大小          p.setTextSize(16);          p.setAntiAlias(true);// 去锯齿          canvas.drawBitmap(target, 0, 0, p);          // 在中间位置开始添加水印          canvas.drawText(str, w / 2, h / 2, p);          canvas.save(Canvas.ALL_SAVE_FLAG);          canvas.restore();          return bmp;      }  }