android4.0 按键mount和umount UsbStorage

1. 注册MyReceiver广播
framework/base/packages/SystemUI/AndroidManifest.xml
+ <receiver android:name=".MyReceiver" >
+ <intent-filter>
+ <action android:name="android.intent.action.SMITUSBMASS" />
+ </intent-filter>
+ </receiver>

2. 增加MyReceiver.java这个文件，接收广播执行UsbStorageActivity
frameworks/base/packages/SystemUI/src/com/android/systemui/MyReceiver.java
/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.systemui;

import android.content.BroadcastReceiver;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.provider.Settings;
import android.util.Slog;
import android.content.ComponentName;

/**
 * Performs a number of miscellaneous, non-system-critical actions
 * after the system has finished booting.
 */
public class MyReceiver extends BroadcastReceiver {
    private static final String TAG = "SystemUIMyReceiver";

    @Override
    public void onReceive(final Context context, Intent intent) {
        try {
            Intent loadavg = new Intent();
            ComponentName component = new ComponentName("com.android.systemui",
                                "com.android.systemui.usb.UsbStorageActivity");
            if(component != null) {
                loadavg.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                loadavg.setComponent(component);
                context.startActivity(loadavg);
            } else {
                Slog.e(TAG, "componenet is not existed");
            }
        } catch (Exception e) {
            Slog.e(TAG, "Can't start startActivity", e);
        }
    }
}

3. 增加按键F1, 发送广播
framework/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
+ if ((keyCode == KeyEvent.KEYCODE_F1) && !down) {
+ //setDisplddayOutput();

+ Intent intent = new Intent();
+ intent.setAction("android.intent.action.SMITUSBMASS");//

+ mContext.sendBroadcast(intent);
+
+ }

         if ((keyCode == KeyEvent.KEYCODE_F3) && !down) {

4. 增加按键F11, 挂载和卸载UsbStorage到PC机.
frameworks/base/packages/SystemUI/src/com/android/systemui/usb/UsbStorageActivity.java
+import android.view.KeyEvent;

    // 增加SetTheUsbMass函数

    private void SetTheUsbMass() {
        Log.e(TAG, "+++++++++++++++++++++SetTheUsbMass");
        if(!mStorageManager.isUsbMassStorageEnabled()) {
            Log.e(TAG, "+++++++++++++++++++++SetUsbMassStorageEnabled");
            checkStorageUsers();
        } else {
            Log.e(TAG, "22222+++++++++++++++++++++SetUsbMassStoragedisabled");
            switchUsbMassStorage(false);
        }
    }

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ......
+        SetTheUsbMass();
+        finish();
    }

    // 增加onKeyDown函数

    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if(keyCode==KeyEvent.KEYCODE_F11)
        {
            // Check for list of storage users and display dialog if needed.

            if(!mStorageManager.isUsbMassStorageEnabled())
                checkStorageUsers();
            else
                switchUsbMassStorage(false);
        }
        return super.onKeyDown(keyCode, event);
    }