protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); if(requestCode==PictureSelector.SELECT_REQUEST_CODE){ if(data!=null){ PictureBean pictureBean=data.getParcelableExtra(PictureSelector.PICTURE_RESULT); path=pictureBean.getPath(); Glide.with(this).load(pictureBean.getPath()).into(iv_tupian); } } else if (requestCode == 1) { if (resultCode == RESULT_OK) { Uri uri = data.getData(); if (uri != null) { String path = FileUtils.getInstance().getPath(this, uri); if (path != null) { PATH = path; et_wj.setText(FileUtils.getInstance().getFileNameWithSuffix(PATH)); } } } } }解释一下

Android使用Intent实现页面跳转

protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == 1) { if (resultCode == RESULT_OK) { String...

onActivityResult的小demo

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == REQUEST_IMAGE_CAPTURE && ...

public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); medicadapter=new Medicadapter(getActivity(), RedianDbutils.getInstance(getActivity()).load()); datahuodong.setAdapter(medicadapter); }解释一下

这是一段Java代码，主要实现的功能是在活动返回结果时更新列表数据。当具有请求码为“102”的活动返回结果时，程序会调用这个函数。在函数中，程序会使用名为“RedianDbutils”的数据库工具类中的“load”函数重新...

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == PictureSelector.SELECT_REQUEST_CODE) { if (data != null) { PictureBean pictureBean = data.getParcelableExtra(PictureSelector.PICTURE_RESULT); Glide.with(this).load(pictureBean.getPath()).into(imageHead); path = pictureBean.getPath(); } } }解释一下

在这段代码中，我们判断 requestCode 是否与 PictureSelector.SELECT_REQUEST_CODE 相等，这个值通常用于标记我们启动子 Activity 的请求。如果相等，则判断 data 是否为 null，如果不为 null，则从 Intent 中获取一...

android 在fragment中调用public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data)方法，为什么方法不被执行

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); // your code } 希望能帮助到你解决问题。

@Override protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); switch (requestCode) { case BleService.CODE_DISCOVERABLE: // 否是0 Log.d(TAG, "onActivityResult: 蓝牙检测开启结果" + resultCode); if (resultCode > 0) { // 执行蓝牙搜索 startSearch(); } else { // 选择了否，不需要多余的提示 //failed(); } break; default: break; } }

在此代码中，当requestCode为BleService.CODE_DISCOVERABLE时，根据resultCode的值来判断是否成功打开了蓝牙，如果成功则执行startSearch方法，否则不进行任何操作。该方法的作用是处理调用startActivityForResult...

tp.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent(Intent.ACTION_GET_CONTENT); intent.setType("image/*"); startActivityForResult(intent,100); } }); } @Override protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode==100 && data!=null){ try { InputStream inputStream = getContentResolver().openInputStream(data.getData()); Bitmap bitmap = BitmapFactory.decodeStream(inputStream); File file = new File("data/data/com.bawei.app2/image.jgp"); if (!file.exists()){ file.createNewFile(); } BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(new FileOutputStream(file)); bitmap.compress(Bitmap.CompressFormat.JPEG,20,bufferedOutputStream); message = JMessageClient.createSingleImageMessage(username,appkey,file); send(); } catch (Exception e) { e.printStackTrace(); } } }

选择完成后，会返回到当前Activity的onActivityResult方法中，将选择的图片文件保存到本地的data/data/com.bawei.app2/image.jgp路径下，并将该文件作为参数，创建一个JMessageClient的单聊图片消息message对象，...

@Override protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent intent){ super.onActivityResult(requestCode,resultCode,intent); if(intent==null){ return; } switch (requestCode){ case REQUEST_REGISTER_CODE: if (resultCode==11){ tvUserId.setText(intent.getStringExtra("userId")); tvUsername.setText(intent.getStringExtra("userName")); ivLogin.setImageResource(R.mipmap.user_2); Toast.makeText(this,"注册成功!",Toast.LENGTH_LONG).show(); }else{ Toast.makeText(this,"注册失败!",Toast.LENGTH_LONG).show(); } break; case REQUEST_LOGIN_CODE: if(resultCode==21){ tvUserId.setText(intent.getStringExtra("userId")); tvUsername.setText(intent.getStringExtra("userName")); ivLogin.setImageResource(R.mipmap.user_2); Toast.makeText(this,"登录成功!",Toast.LENGTH_LONG).show(); }else{ Toast.makeText(this,"登录失败!",Toast.LENGTH_LONG).show(); } break; default: Toast.makeText(this,"操作失败!",Toast.LENGTH_LONG).show(); break; } }现在有一个新的页面Activity应如何修改本代码进行跳转

如果你要在当前Activity中跳转到一个新的Activity，你需要在当前Activity中添加一个Intent，然后调用startActivity方法来启动新的Activity。以下是一个示例代码： Intent intent = new Intent(CurrentActivity....

请解释以下代码@SuppressLint("SetTextI18n") protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); ImageView img_result=(ImageView) findViewById(R.id.pic); switch (requestCode) { case TAKE_PHOTO: if (resultCode == RESULT_OK) { //将图片解析成Bitmap对象，并把它显现出来 // String filePath = getFilesDir().getAbsolutePath()+"/image.jpeg"; // bitmap = BitmapFactory.decodeFile(filePath); //注意bitmap，后面再decode就会为空 try { bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri)); } catch (FileNotFoundException e) { e.printStackTrace(); } // bitmap = BitmapFactory.decodeFile(picpath); picpath=imageUri.getPath().toString(); Log.e("", imageUri.getAuthority()); Log.e("picpath",picpath); @SuppressLint("SdCardPath") String fileName = picpath; img_result.setImageBitmap(bitmap); img_result.invalidate(); } break; case SCAN_OPEN_PHONE: if (resultCode == RESULT_OK){ Uri selectImage=data.getData(); String[] FilePathColumn={MediaStore.Images.Media.DATA}; Cursor cursor = getContentResolver().query(selectImage, FilePathColumn, null, null, null); cursor.moveToFirst(); //从数据视图中获取已选择图片的路径 int columnIndex = cursor.getColumnIndex(FilePathColumn[0]); picpath = cursor.getString(columnIndex); Log.e("picpath",picpath); cursor.close(); bitmap = BitmapFactory.decodeFile(picpath); img_result.setImageBitmap(bitmap); img_result.invalidate(); } break; default: break; } }

这段代码是一个 Android 应用程序中的 onActivityResult() 方法，用于处理从相机或相册中获取图片后的返回结果。其中，TAKE_PHOTO 和 SCAN_OPEN_PHONE 是两个请求码，用于区分不同的请求。如果请求成功，将获取到的...

请检查和解释以下代码@Override @SuppressLint("SetTextI18n") protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); ImageView img_result=(ImageView) findViewById(R.id.pic); switch (requestCode) { case TAKE_PHOTO: if (resultCode == RESULT_OK) { //将图片解析成Bitmap对象，并把它显现出来 //String filePath = getFilesDir().getAbsolutePath()+"/image.jpeg"; //bitmap = BitmapFactory.decodeFile(filePath); //注意bitmap，后面再decode就会为空 try { bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri)); } catch (FileNotFoundException e) { e.printStackTrace(); } //bitmap = BitmapFactory.decodeFile(picpath); picpath=imageUri.getPath().toString(); Log.e("", imageUri.getAuthority()); Log.e("picpath",picpath); @SuppressLint("SdCardPath") String fileName = picpath; img_result.setImageBitmap(bitmap); img_result.invalidate(); } break; case SCAN_OPEN_PHONE: if (resultCode == RESULT_OK){ Uri selectImage=data.getData(); String[] FilePathColumn={MediaStore.Images.Media.DATA}; Cursor cursor = getContentResolver().query(selectImage, FilePathColumn, null, null, null); cursor.moveToFirst(); //从数据视图中获取已选择图片的路径 int columnIndex = cursor.getColumnIndex(FilePathColumn[0]); picpath = cursor.getString(columnIndex); Log.e("picpath",picpath); cursor.close(); bitmap = BitmapFactory.decodeFile(picpath); img_result.setImageBitmap(bitmap); img_result.invalidate(); } break; default: break; } //处理图像数据,以上传到mysql ByteArrayOutputStream baos = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos); piccjg = baos.toByteArray(); }

这是一段Android代码，用于处理拍照和选择相册图片后的操作。在拍照或选择相册图片后，会将图片解析成Bitmap对象，并将其显示在ImageView中。最后，将Bitmap对象压缩成JPEG格式的字节数组，以便上传到MySQL数据库。

package com.example.dzy; import androidx.annotation.Nullable; import androidx.appcompat.app.AppCompatActivity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends AppCompatActivity implements View.OnClickListener { private Button btnLogin,btnRegister; private ImageView ivLogin; private TextView tvUsername,tvUserId; private static final int REQUEST_REGISTER_CODE=1; private static final int REQUEST_LOGIN_CODE=2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tvUserId=findViewById(R.id.tv_main_userid); tvUsername=findViewById(R.id.tv_main_username); ivLogin=findViewById(R.id.iv_login); btnLogin=findViewById(R.id.btn_main_login); btnRegister=findViewById(R.id.btn_main_register); btnLogin.setOnClickListener(this); btnRegister.setOnClickListener(this); } @Override public void onClick(View view){ Intent intent=new Intent(); switch (view.getId()){ case R.id.btn_main_login: intent.setClass(this,LoginActivity.class); startActivityForResult(intent,REQUEST_LOGIN_CODE); break; case R.id.btn_main_register: intent.setClass(this,RegisterActivity.class); startActivityForResult(intent,REQUEST_REGISTER_CODE); break; } } @Override protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent intent){ super.onActivityResult(requestCode,resultCode,intent); if(intent==null){ return; } switch (requestCode){ case REQUEST_REGISTER_CODE: if (resultCode==11){ tvUserId.setText(intent.getStringExtra("userId")); tvUsername.setText(intent.getStringExtra("userName")); ivLogin.setImageResource(R.mipmap.user_2); Toast.makeText(this,"注册成功!",Toast.LENGTH_LONG).show(); Intent intent1=new Intent(this,NavigationActivity.class); }else{ Toast.makeText(this,"注册失败!",Toast.LENGTH_LONG).show(); } break; case REQUEST_LOGIN_CODE: if(resultCode==21){ tvUserId.setText(intent.getStringExtra("userId")); tvUsername.setText(intent.getStringExtra("userName")); ivLogin.setImageResource(R.mipmap.user_2); Toast.makeText(this,"登录成功!",Toast.LENGTH_LONG).show(); Intent intent1=new Intent(this,NavigationActivity.class); }else{ Toast.makeText(this,"登录失败!",Toast.LENGTH_LONG).show(); } break; default: Toast.makeText(this,"操作失败!",Toast.LENGTH_LONG).show(); break; } } }这段中intent1没有进行页面跳转

if (resultCode==11){ tvUserId.setText(intent.getStringExtra("userId")); tvUsername.setText(intent.getStringExtra("userName")); ivLogin.setImageResource(R.mipmap.user_2); Toast.makeText(this,"注册...

@Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); recyclerView = findViewById(R.id.recycler_view); button = findViewById(R.id.take_photo); //点击拍照 button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(ContextCompat.checkSelfPermission(getApplicationContext(),Manifest.permission.CAMERA)!=PackageManager.PERMISSION_GRANTED){ ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest.permission.CAMERA},REQUEST_CAMERA_PERMISSION); }else { takePicture(); } } }); }这个代码里面怎么添加保存照片的操作

protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) { // 获取拍照结果的Bitmap对象 Bitmap bitmap = ...

1. 编程实现Intent的显示跳转。在MainActivity中定义Intent，启动SeconActivity，能够获取SecondActivity的返回值； 2、使用Intent过滤器实现隐式跳转。在MainActiviy中定义Intent，要求必须用到自定义的action、category、data来启动ThirdActivity； 3. 实现通过Intent调用android内置浏览器； 4. 通过Intent实现广播消息的接收。在MainActivity中定义Intent，将界面上某文本框中的内容以广播消息的形式发出。广播消息可以使用Toast或Logcat。

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == REQUEST_CODE && resultCode == ...

Request Code需要如何定义

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == REQUEST_CODE && resultCode == ...

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.hardware.display.VirtualDisplay android.media.projection.MediaProjection.createVirtualDisplay(java.lang.String, int, int, int, int, android.view.Surface, android.hardware.display.VirtualDisplay$Callback, android.os.Handler)' on a null object reference

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == REQUEST_CODE_SCREEN_CAPTURE && ...

'startActivityForResult(android.content.Intent, android.app.ActivityResultLaunche r)'，这个怎么使用

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == 1 && resultCode == RESULT_OK) { ...

android 自定义组件获取onactivityresult值

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == YOUR_REQUEST_CODE) { mResultCode...

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