android选择本地相册或拍照更换软件背景图片

来源：互联网发布：diy婚庆域名编辑：程序博客网时间：2024/05/16 17:11

最近做了一个小软件，想实现动态替换背景图片的效果，查找资料半天才实现哭，下面是代码：

随便给了一个ImageView,通过点击图片来更换背景

<ImageView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:id="@+id/photo"            android:src="@drawable/ic_launcher"            />

后台的实现

@Override    public void onClick(View v) {        // TODO Auto-generated method stub        switch (v.getId()) {            case R.id.photo:                showChoosePhotoDialog();                break;            default:                break;        }    }    private void showChoosePhotoDialog() {        CharSequence[] items = { "相册", "相机" };        AlertDialog dialog = new AlertDialog.Builder(this)                .setTitle("选择图片来源")                .setItems(items, new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialog, int which) {                        // TODO Auto-generated method stub                        if (which == SELECT_PICTURE) {                            Intent intent = new Intent(                                    MediaStore.ACTION_IMAGE_CAPTURE);                            startActivityForResult(intent, SELECT_CAMER);                        } else {                            Intent intent = new Intent(                                    Intent.ACTION_GET_CONTENT);                            intent.addCategory(Intent.CATEGORY_OPENABLE);                            intent.setType("image/*");                            startActivityForResult(intent, SELECT_PICTURE);                        }                    }                })                .setNegativeButton("取消", new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialog, int which) {                        // TODO Auto-generated method stub                        dialog.cancel();                    }                }).create();        dialog.show();    }//选择图片或拍完照片之后触发@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {        // TODO Auto-generated method stub        super.onActivityResult(requestCode, resultCode, data);        if (resultCode == RESULT_OK) {            Uri uri = data.getData();            Cursor cursor = getContentResolver().query(uri, null, null, null, null);//用ContentProvider查找选中的图片            cursor.moveToFirst();            String path=cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));//获取图片的绝对路径            // 获取手机屏幕的像素            DisplayMetrics dm = new DisplayMetrics();            getWindowManager().getDefaultDisplay().getMetrics(dm);            Resources s = getResources();            setBackGround(path,dm,s);            cursor.close();        } else {            Toast.makeText(DialogActivity.this, "选择图片失败,请重新选择", Toast.LENGTH_SHORT)                    .show();        }    }  //设置背景图片  public void setBackGround( String path, DisplayMetrics dm,Resources s){        File imageFile=new File(path);        Drawable drawable= Drawable.createFromPath(path);        BitmapDrawable bd = (BitmapDrawable) drawable;        bmp = bd.getBitmap();        //压缩图片        bmp = Bitmap.createScaledBitmap(bmp, dm.widthPixels, dm.heightPixels, true);        Log.i("wechat", "压缩后图片的大小" + (bmp.getByteCount()/ 1024 / 1024 ) + "M宽度为"                + bmp.getWidth() + "高度为" + bmp.getHeight());        CarInsuranceActivity.layout.setBackground(new BitmapDrawable(s, bmp));    }

初学android，有不对的地方望指出

阅读全文

0 0