调用 系统蓝牙接口 发送文件

先看一下系统源码

com.android.bluetooth.opp.BluetoothOppLauncherActivity

/*
 * Copyright (c) 2008-2009, Motorola, Inc.
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * - Neither the name of the Motorola, Inc. nor the names of its contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */


package com.android.bluetooth.opp;


import com.android.bluetooth.R;


import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;


import android.app.Activity;
import android.bluetooth.BluetoothDevicePicker;
import android.content.Intent;
import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.provider.Settings;


/**
 * This class is designed to act as the entry point of handling the share intent
 * via BT from other APPs. and also make "Bluetooth" available in sharing method
 * selection dialog.
 */
public class BluetoothOppLauncherActivity extends Activity {
    private static final String TAG = "BluetoothLauncherActivity";
    private static final boolean D = Constants.DEBUG;
    private static final boolean V = Constants.VERBOSE;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        Intent intent = getIntent();
        String action = intent.getAction();


        if (action.equals(Intent.ACTION_SEND) || action.equals(Intent.ACTION_SEND_MULTIPLE)) {
            /*
             * Other application is trying to share a file via Bluetooth,
             * probably Pictures, videos, or vCards. The Intent should contain
             * an EXTRA_STREAM with the data to attach.
             */
            if (action.equals(Intent.ACTION_SEND)) {
                // TODO: handle type == null case
                String type = intent.getType();
                Uri stream = (Uri)intent.getParcelableExtra(Intent.EXTRA_STREAM);
                CharSequence extra_text = intent.getCharSequenceExtra(Intent.EXTRA_TEXT);
                // If we get ACTION_SEND intent with EXTRA_STREAM, we'll use the
                // uri data;
                // If we get ACTION_SEND intent without EXTRA_STREAM, but with
                // EXTRA_TEXT, we will try send this TEXT out; Currently in
                // Browser, share one link goes to this case;
                if (stream != null && type != null) {
                    if (V) Log.v(TAG, "Get ACTION_SEND intent: Uri = " + stream + "; mimetype = "
                                + type);
                    // Save type/stream, will be used when adding transfer
                    // session to DB.
                    BluetoothOppManager.getInstance(this).saveSendingFileInfo(type,
                            stream.toString());
                } else if (extra_text != null && type != null) {
                    if (V) Log.v(TAG, "Get ACTION_SEND intent with Extra_text = "
                                + extra_text.toString() + "; mimetype = " + type);
                    Uri fileUri = creatFileForSharedContent(this, extra_text);


                    if (fileUri != null) {
                        BluetoothOppManager.getInstance(this).saveSendingFileInfo(type,
                                fileUri.toString());
                    }
                } else {
                    Log.e(TAG, "type is null; or sending file URI is null");
                    finish();
                    return;
                }
            } else if (action.equals(Intent.ACTION_SEND_MULTIPLE)) {
                ArrayList<Uri> uris = new ArrayList<Uri>();
                String mimeType = intent.getType();
                uris = intent.getParcelableArrayListExtra(Intent.EXTRA_STREAM);
                if (mimeType != null && uris != null) {
                    if (V) Log.v(TAG, "Get ACTION_SHARE_MULTIPLE intent: uris " + uris + "\n Type= "
                                + mimeType);
                    BluetoothOppManager.getInstance(this).saveSendingFileInfo(mimeType, uris);
                } else {
                    Log.e(TAG, "type is null; or sending files URIs are null");
                    finish();
                    return;
                }
            }


            if (isAirplaneModeOn()) {
                Intent in = new Intent(this, BluetoothOppBtErrorActivity.class);
                in.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                in.putExtra("title", this.getString(R.string.airplane_error_title));
                in.putExtra("content", this.getString(R.string.airplane_error_msg));
                this.startActivity(in);


                finish();
                return;
            }


            // TODO: In the future, we may send intent to DevicePickerActivity
            // directly,
            // and let DevicePickerActivity to handle Bluetooth Enable.
            if (!BluetoothOppManager.getInstance(this).isEnabled()) {
                if (V) Log.v(TAG, "Prepare Enable BT!! ");
                Intent in = new Intent(this, BluetoothOppBtEnableActivity.class);
                in.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                this.startActivity(in);
            } else {
                if (V) Log.v(TAG, "BT already enabled!! ");
                Intent in1 = new Intent(BluetoothDevicePicker.ACTION_LAUNCH);
                in1.setFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
                in1.putExtra(BluetoothDevicePicker.EXTRA_NEED_AUTH, false);
                in1.putExtra(BluetoothDevicePicker.EXTRA_FILTER_TYPE,
                        BluetoothDevicePicker.FILTER_TYPE_TRANSFER);
                in1.putExtra(BluetoothDevicePicker.EXTRA_LAUNCH_PACKAGE,
                        Constants.THIS_PACKAGE_NAME);
                in1.putExtra(BluetoothDevicePicker.EXTRA_LAUNCH_CLASS,
                        BluetoothOppReceiver.class.getName());


                this.startActivity(in1);
            }
        } else if (action.equals(Constants.ACTION_OPEN)) {
            Uri uri = getIntent().getData();
            if (V) Log.v(TAG, "Get ACTION_OPEN intent: Uri = " + uri);


            Intent intent1 = new Intent();
            intent1.setAction(action);
            intent1.setClassName(Constants.THIS_PACKAGE_NAME, BluetoothOppReceiver.class.getName());
            intent1.setData(uri);
            this.sendBroadcast(intent1);
        }
        finish();
    }


    /* Returns true if airplane mode is currently on */
    private final boolean isAirplaneModeOn() {
        return Settings.System.getInt(this.getContentResolver(), Settings.System.AIRPLANE_MODE_ON,
                0) == 1;
    }
    private Uri creatFileForSharedContent(Context context, CharSequence shareContent) {
        if (shareContent == null) {
            return null;
        }


        Uri fileUri = null;
        FileOutputStream outStream = null;
        try {
            String fileName = getString(R.string.bluetooth_share_file_name) + ".html";
            context.deleteFile(fileName);


            String uri = shareContent.toString();
            String content = "<html><head><meta http-equiv=\"Content-Type\" content=\"text/html;"
                + " charset=UTF-8\"/></head><body>" + "<a href=\"" + uri + "\">" + uri + "</a></p>"
                + "</body></html>";
            byte[] byteBuff = content.getBytes();


            outStream = context.openFileOutput(fileName, Context.MODE_PRIVATE);
            if (outStream != null) {
                outStream.write(byteBuff, 0, byteBuff.length);
                fileUri = Uri.fromFile(new File(context.getFilesDir(), fileName));
                if (fileUri != null) {
                    if (D) Log.d(TAG, "Created one file for shared content: "
                            + fileUri.toString());
                }
            }
        } catch (FileNotFoundException e) {
            Log.e(TAG, "FileNotFoundException: " + e.toString());
            e.printStackTrace();
        } catch (IOException e) {
            Log.e(TAG, "IOException: " + e.toString());
        } catch (Exception e) {
            Log.e(TAG, "Exception: " + e.toString());
        } finally {
            try {
                if (outStream != null) {
                    outStream.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return fileUri;
    }
}

配置文件

  <activity android:name=".opp.BluetoothOppLauncherActivity"
            android:process="@string/process"
            android:theme="@android:style/Theme.Dialog" android:label="@string/bt_share_picker_label">
            <intent-filter>
                <action android:name="android.intent.action.SEND" />
                <category android:name="android.intent.category.DEFAULT" />
                <data android:mimeType="image/*" />
                <data android:mimeType="video/*" />
                <data android:mimeType="audio/*" />
                <data android:mimeType="text/x-vcard" />
                <data android:mimeType="text/plain" />
                <data android:mimeType="text/html" />
                <data android:mimeType="application/zip" />
                <data android:mimeType="application/vnd.ms-excel" />
                <data android:mimeType="application/msword" />
                <data android:mimeType="application/vnd.ms-powerpoint" />
                <data android:mimeType="application/pdf" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.intent.action.SEND_MULTIPLE" />
                <category android:name="android.intent.category.DEFAULT" />
                <data android:mimeType="image/*" />
                <data android:mimeType="video/*" />
                <data android:mimeType="x-mixmedia/*" />
                <data android:mimeType="text/x-vcard" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.btopp.intent.action.OPEN" />
                <category android:name="android.intent.category.DEFAULT" />
                <data android:mimeType="vnd.android.cursor.item/vnd.android.btopp" />
            </intent-filter>
        </activity>

客户端调用实现

        Intent intent = new Intent();
		intent.setAction(Intent.ACTION_SEND);
//		intent.setType("application/octet-stream");
		intent.setType("*/*"); //
		intent.setClassName("com.android.bluetooth"
                , "com.android.bluetooth.opp.BluetoothOppLauncherActivity");
		intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile( new File("/sdcard/20095111013295162.jpg")));
		startActivity(intent);

真机测试可以直接发送image到另一台设备中