带货直播系统，实现简单的换头像并保存的相关代码
public class My_info extends AppCompatActivity implements View.OnClickListener { private static final int CHOOSE_PHOTO=2; private CircleImageView image;//一种用于图片圆形化的控件 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_my_info); image=(CircleImageView)findViewById(R.id.p_pic); if(readPac()!=null){ image.setImageBitmap(readPac());//如果头像修改过了，内存中已经新的头像图片。 } @Override public void onClick(View v){ switch (v.getId()){ case R.id.alter: //点击修改头像事件 / if(ContextCompat.checkSelfPermission(My_info.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)!= PackageManager. PERMISSION_GRANTED){ ActivityCompat.requestPermissions(My_info.this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},1); //以上是访问图库的运行时权限/ }else { open();//打开图库 } break; default: break; } } @Override //这里是对用户是否同意访问图库的处理 public void onRequestPermissionsResult(int requestCode,String[] permissions,int [] grantResults){ switch (requestCode){ case 1: if(grantResults.length>0 && grantResults[0]==PackageManager.PERMISSION_GRANTED){ open(); }else{ Toast.makeText(My_info.this,"您拒绝了权限",Toast.LENGTH_SHORT).show(); } break; default: } } //打开图库 private void open(){ Intent intent=new Intent("android.intent.action.GET_CONTENT"); intent.setType("image/*"); startActivityForResult(intent,CHOOSE_PHOTO); } // @Override protected void onActivityResult(int requestCode,int reultCode,Intent data){ switch (requestCode){ case CHOOSE_PHOTO: if(reultCode==RESULT_OK){ handle(data); } break; } } private void handle(Intent data){ String imagePath=null; Uri uri=data.getData(); if(DocumentsContract.isDocumentUri(this,uri)){ String docId=DocumentsContract.getDocumentId(uri); / if("com.android.providers.media.documents".equals(uri.getAuthority())){ String id=docId.split(":")[1]; String selection= MediaStore.Images.Media._ID+"="+id; imagePath=getImagePath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,selection); }else if("com.android.providers.dowmloads.documents".equals(uri.getAuthority())){ Uri contentUri= ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"),Long.valueOf(docId)); imagePath=getImagePath(contentUri,null); }else if("content".equalsIgnoreCase(uri.getScheme())){ imagePath=getImagePath(uri,null); }else if("file".equalsIgnoreCase(uri.getScheme())){ imagePath=uri.getPath(); } displayImage(imagePath); } } private String getImagePath(Uri uri,String selection){ String path=null; Cursor cursor=getContentResolver().query(uri,null,selection,null,null); if(cursor!=null){ if(cursor.moveToFirst()){ path=cursor.getString(cursor.getColumnIndex(MediaStore.Ima//ges.Media.DATA)); } cursor.close(); } return path; } private void displayImage(Str/ing imagePath){ if(imagePath!=null){ Bitmap bitmap= BitmapFactory.decodeFile(imagePath); image.setImageBitmap(bitmap); Toast.makeText(My_info.this,"获取图片成功",Toast.LENGTH_SHORT).show(); savePac(bitmap); }else { Toast.makeText(My_info.this,"获取图片失败",Toast.LENGTH_SHORT).show(); } } //以上获取图片的绝对路径再获取bitmap实例过程来自《第一行代码 第2版》P299// // // // private void savePac(Bitmap bitmap){//保存图片 String TargetPath=My_info.this.getFilesDir().toString()+File.separator+"imagic";//getFilesDir()方法用于获取/data/data//files目录 File file=new File(TargetPath,"pac.jpg"); file.delete(); if(!file.exists()){ file.getParentFile().mkdirs(); } try{ FileOutputStream fileOutputStrea=new FileOutputStream(file); bitmap.compress(Bitmap.CompressFormat.JPEG,80,fileOutputStream); fileOutputStream.flush(); fileOutputStream.close(); }catch (Exception e){ Log.d("cnm", e.toString()); } } private Bitmap readPac(){//读取图片 String savePath=My_info.this.getFilesDir().toString()+File.separator+"imagic"+File.separator+"pac.jpg"; Bitmap bitmap = null; try{ bitmap = BitmapFactory.decodeFile(savePath); } catch (Exception e) {} return bitmap; } }以上就是 带货直播系统，实现简单的换头像并保存的相关代码，更多内容欢迎关注之后的文章
