我想在android中使用凌空发送图像和一些数据

Question

[我想使用截击发送图像以及数据帮助我，我需要最简单的发送方法，请帮助我，我在邮递员中尝试过，我选择了文件而不是文本，并且一切顺利，我需要那样。

Map<String, String> params = new HashMap<String, String>();
                params.put("number", strUserName.trim());
            params.put("image", image);
                JSONObject json = new JSONObject(params);
                String url = "";
                JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, url
                        , json, new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {
                        try {
                            JSONObject object = new JSONObject(String.valueOf(response));
                            String status = object.getString("Status");
                            if (status.equals("200")) {
                                Intent intent = new Intent(MainActivity.this, OtpVerification.class);
                                intent.putExtra("mobile1",strUserName);
                                startActivity(intent);
                                finish();
                            } else if(status.equals("404")) {
                                Toast.makeText(MainActivity.this, "Please Enter Valid No.", Toast.LENGTH_SHORT).show();
                            }

                        } catch (JSONException e) {
                            Log.e("Ashish", " " + e);
                            e.printStackTrace();
                        }
                    }
                }, new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        error.printStackTrace();
                    }
                });
                mQueue.add(jsonObjectRequest);
            }

Answer 1

示例代码：

Volley图片上传布局

用于创建以上布局，您可以使用以下xml代码

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="16dp"
    android:orientation="vertical">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="Upload Image using Volley"
        android:id="@+id/textView"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="10dp"/>
    <Button
        android:id="@+id/button_choose"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@color/colorAccent"
        android:text="Browse Image"
        android:textColor="#fff"
        android:layout_gravity="center_horizontal"
        android:layout_margin="20dp"
        android:padding="10dp"/>
    <ImageView
        android:id="@+id/imageView"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:background="@drawable/border"
        android:layout_gravity="center_horizontal"
        android:padding="5dp"
        android:layout_margin="20dp"/>
    <Button
        android:id="@+id/button_upload"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@color/colorAccent"
        android:text="upload"
        android:textColor="#fff"
        android:layout_gravity="center_horizontal"
        android:layout_margin="20dp"/>
</LinearLayout>

现在进入MainActivity.java

public class MainActivity extends AppCompatActivity {
    private ImageView imageView;
    private Button btnChoose, btnUpload;
    public static String BASE_URL = "http://192.168.1.100/AndroidUploadImage/upload.php";
    static final int PICK_IMAGE_REQUEST = 1;
    String filePath;

现在将OnClickListener接口实现为我们的按钮。

btnChoose.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        imageBrowse();
    }
});
btnUpload.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        if (filePath != null) {
            imageUpload(filePath);
        } else {
            Toast.makeText(getApplicationContext(), "Image not selected!", Toast.LENGTH_LONG).show();
        }
    }
});

现在，我们将创建一种从图库中选择图像的方法。创建以下方法。

private void imageBrowse() {
    Intent galleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    // Start the Intent
    startActivityForResult(galleryIntent, PICK_IMAGE_REQUEST);
}

为了完成图像选择过程，我们需要重写以下方法。

public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
        if(requestCode == PICK_IMAGE_REQUEST){
            Uri picUri = data.getData();
            filePath = getPath(picUri);
            imageView.setImageURI(picUri);
        }
    }
}

// Get Path of selected image
private String getPath(Uri contentUri) {
    String[] proj = { MediaStore.Images.Media.DATA };
    CursorLoader loader = new CursorLoader(getApplicationContext(),    contentUri, proj, null, null, null);
    Cursor cursor = loader.loadInBackground();
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    String result = cursor.getString(column_index);
    cursor.close();
    return result;
}

有关Android图像的更多信息，请阅读Android ImageView的惊人事实。

现在运行您的应用程序，如果您可以从图库中选择图像，则可以继续。在下面的快照中，您可以看到我的应用正在运行。使用Volley上传图片

现在，我们需要再创建一个将图像上传到我们服务器的方法。在MainActivity类中创建以下方法。

private void imageUpload(final String imagePath) {
    SimpleMultiPartRequest smr = new SimpleMultiPartRequest(Request.Method.POST, BASE_URL,
            new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    Log.d("Response", response);
                    try {
                        JSONObject jObj = new JSONObject(response);
                        String message = jObj.getString("message");
                        Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();
                    } catch (JSONException e) {
                        // JSON error
                        e.printStackTrace();
                        Toast.makeText(getApplicationContext(), "Json error: " + e.getMessage(), Toast.LENGTH_LONG).show();
                    }
                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_LONG).show();
        }
    });
    smr.addFile("image", imagePath);
    MyApplication.getInstance().addToRequestQueue(smr);
}

因此，MainActivity.java文件的最终完整代码将是

public class MainActivity extends AppCompatActivity {
    private ImageView imageView;
    private Button btnChoose, btnUpload;
    public static String BASE_URL = "http://192.168.1.100/AndroidUploadImage/upload.php";
    static final int PICK_IMAGE_REQUEST = 1;
    String filePath;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView = (ImageView) findViewById(R.id.imageView);
        btnChoose = (Button) findViewById(R.id.button_choose);
        btnUpload = (Button) findViewById(R.id.button_upload);
        btnChoose.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                imageBrowse();
            }
        });
        btnUpload.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (filePath != null) {
                    imageUpload(filePath);
                } else {
                    Toast.makeText(getApplicationContext(), "Image not selected!", Toast.LENGTH_LONG).show();
                }
            }
        });
    }
    private void imageBrowse() {
        Intent galleryIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        // Start the Intent
        startActivityForResult(galleryIntent, PICK_IMAGE_REQUEST);
    }
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK) {
            if(requestCode == PICK_IMAGE_REQUEST){
                Uri picUri = data.getData();
                Log.d("picUri", picUri.toString());
                Log.d("filePath", filePath);
                imageView.setImageURI(picUri);
            }
        }
    }
    private void imageUpload(final String imagePath) {
        SimpleMultiPartRequest smr = new SimpleMultiPartRequest(Request.Method.POST, BASE_URL,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        Log.d("Response", response);
                        try {
                            JSONObject jObj = new JSONObject(response);
                            String message = jObj.getString("message");
                            Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();
                        } catch (JSONException e) {
                            // JSON error
                            e.printStackTrace();
                            Toast.makeText(getApplicationContext(), "Json error: " + e.getMessage(), Toast.LENGTH_LONG).show();
                        }
                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_LONG).show();
            }
        });
        smr.addFile("image", imagePath);
        MyApplication.getInstance().addToRequestQueue(smr);
    }
    // Get Path of selected image
    private String getPath(Uri contentUri) {
        String[] proj = { MediaStore.Images.Media.DATA };
        CursorLoader loader = new CursorLoader(getApplicationContext(), contentUri, proj, null, null, null);
        Cursor cursor = loader.loadInBackground();
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        String result = cursor.getString(column_index);
        cursor.close();
        return result;
    }
}

现在最后向您的应用添加以下权限。

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

MyApplication.java

public class MyApplication extends Application {
    public static final String TAG = MyApplication.class.getSimpleName();
    private RequestQueue mRequestQueue;

    private static MyApplication mInstance;

    @Override
    public void onCreate() {
        super.onCreate();
        mInstance = this;
    }

    public static synchronized MyApplication getInstance() {
        return mInstance;
    }

    public RequestQueue getRequestQueue() {
        if (mRequestQueue == null) {
            mRequestQueue = Volley.newRequestQueue(getApplicationContext());
        }

        return mRequestQueue;
    }

    public <T> void addToRequestQueue(Request<T> req, String tag) {
        req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
        getRequestQueue().add(req);
    }

    public <T> void addToRequestQueue(Request<T> req) {
        req.setTag(TAG);
        getRequestQueue().add(req);
    }

    public void cancelPendingRequests(Object tag) {
        if (mRequestQueue != null) {
            mRequestQueue.cancelAll(tag);
        }
    }
}

希望这会起作用！