照相机与fileprovider机制

• 浏览器
• 拨号
• 相机
• 摄像
• 截图
• 蓝牙
• FileProvider文件共享

清单文件

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.CALL_PHONE"/>
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

Activity动态添加权限

private void init() {
    String[] strings = {
            Manifest.permission.INTERNET,
            Manifest.permission.CALL_PHONE,
            Manifest.permission.BLUETOOTH,
            Manifest.permission.BLUETOOTH_ADMIN,
            Manifest.permission.ACCESS_FINE_LOCATION,
            Manifest.permission.ACCESS_COARSE_LOCATION,
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
            Manifest.permission.READ_EXTERNAL_STORAGE,
            Manifest.permission.CAMERA
    };
    if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.M){
        requestPermissions(strings,100);
    }
}

浏览器

//浏览器
public void openbrowser(View view) {
    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_VIEW);
    intent.setData(Uri.parse("https://www.baidu.com"));
    startActivity(intent);
}

拨号

//拨号
public void opencall(View view) {
    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_CALL);
    intent.setData(Uri.parse("tel:"+"10086"));
    startActivity(intent);
}

相机

//调用系统相机
public void opencamera(View view) {
Intent intent = new Intent();
intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);//战利品
File file = new File(Environment.getExternalStorageDirectory() + “/test_image.png”);//存到这个位置
Uri uri = FileProvider.getUriForFile(this,“com.example.day10_camera”,file);
intent.putExtra(MediaStore.EXTRA_OUTPUT,uri);
//显示控件
startActivity(intent);
}

摄像

//调用系统视频
public void openvideo(View view) {
    Intent intent = new Intent();
    intent.setAction(MediaStore.ACTION_VIDEO_CAPTURE);
    startActivityForResult(intent,101);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == 101 & resultCode == RESULT_OK){
        //取视频
        Uri uri = data.getData();
        videoView.setVideoURI(uri);
        videoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mediaPlayer) {
                videoView.start();
            }
        });
    }
}

截图

//截图
public void jietu(View view) {
    View decorView = getWindow().getDecorView();//顶层视图
    decorView.setDrawingCacheEnabled(true);
    Bitmap bitmap = decorView.getDrawingCache();//获取图片
    try {
        //存SD卡   1类型 2质量 3地址
        bitmap.compress(Bitmap.CompressFormat.PNG,100,new FileOutputStream(Environment.getExternalStorageDirectory()+"/aaaa.png"));
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
}

蓝牙

IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothDevice.ACTION_FOUND);//查找
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);//结束查找
filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);//绑定
MyReceiver myReceiver = new MyReceiver();
registerReceiver(myReceiver,filter);
init();
BluetoothManager manager = (BluetoothManager) getSystemService(BLUETOOTH_SERVICE);
adapter = manager.getAdapter();
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
        BluetoothDevice device = devices.get(i);
        device.createBond();//配对
    }
});

//打开蓝牙
public void openblue(View view) {
    Intent intent = new Intent();
    intent.setAction(BluetoothAdapter.ACTION_REQUEST_ENABLE);
    intent.setAction(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
    startActivity(intent);
}

//搜索蓝牙
public void search(View view) {
    adapter.startDiscovery();
}

//关闭蓝牙
public void close(View view) {
    adapter.disable();
}

//广播
class MyReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(BluetoothDevice.ACTION_FOUND)){
            //找到的蓝牙
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            String name = device.getName();
            Log.i(TAG, "onReceive: 搜索到的蓝牙"+name);
            if (name != null){
                //存集合
                devices.add(device);
            }
        }else if (intent.getAction().equals(BluetoothAdapter.ACTION_DISCOVERY_FINISHED)){
            //查找结束显示listView
            MyAdapter myAdapter = new MyAdapter();
            listView.setAdapter(myAdapter);
        }else if (intent.getAction().equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)){
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            int bondState = device.getBondState();
            if (bondState == device.BOND_NONE){
                Log.i(TAG, "onReceive: 未绑定");
            }else if (bondState == device.BOND_BONDING){
                Log.i(TAG, "onReceive: 绑定中");
            }else if (bondState == device.BOND_BONDED){
                Log.i(TAG, "onReceive: 已绑定");
            }
        }
    }
}

//适配器
class MyAdapter extends BaseAdapter{

    @Override
    public int getCount() {
        return devices.size();
    }

    @Override
    public Object getItem(int i) {
        return devices.get(i);
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        ViewHolder holder;
        if (view == null){
            holder = new ViewHolder();
            view = LayoutInflater.from(MainActivity.this).inflate(R.layout.item,null);
            holder.nameId = view.findViewById(R.id.bluename_id);
            view.setTag(holder);
        }else {
            holder = (ViewHolder) view.getTag();
        }
        holder.nameId.setText(devices.get(i).getName());
        return view;
    }
    class ViewHolder{
        TextView nameId;
    }
}

FileProvider文件共享

//FileProvider文件共享
//SD卡的路径要提供给相机
//SD 提供  --- 注册
//相机 索要方
Uri uri = FileProvider.getUriForFile(this,"com.example.day10_camera",file);

xml

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">

    ecternal-path:SD卡的根目录  name自定义 path image/.根目录
    <external-path
        name="external_storage_root"
        path="."></external-path>

</paths>

清单文件

<provider
    android:authorities="com.example.day10_camera"
    android:name="androidx.core.content.FileProvider"
    android:exported="false"
    android:grantUriPermissions="true">

    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/file_paths"/>

</provider>