android.hardware.camera2

android.hardware.camera2

下面的代碼可以打開相機

package com.kankanla.e560.m180701_camera;

import android.annotation.SuppressLint;
import android.hardware.camera2.CameraAccessException;
import android.hardware.camera2.CameraCaptureSession;
import android.hardware.camera2.CameraDevice;
import android.hardware.camera2.CameraManager;
import android.hardware.camera2.CaptureRequest;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

import java.util.Arrays;

public class MainActivity extends AppCompatActivity {


    @Override
    protected void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        try {
            mCamera();
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }
    }

    @SuppressLint("MissingPermission")
    protected void mCamera() throws CameraAccessException {
        SurfaceView surfaceView = findViewById(R.id.surfaceView);
        final Surface surface = surfaceView.getHolder().getSurface();
        SurfaceHolder surfaceHolder = surfaceView.getHolder();
        final CameraManager cameraManager = (CameraManager) getSystemService(CAMERA_SERVICE);

        surfaceHolder.addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder holder) {
                try {
                    cameraManager.openCamera("0", new CameraDevice.StateCallback() {
                        @Override
                        public void onOpened(@NonNull final CameraDevice camera) {
                            try {
                                camera.createCaptureSession(Arrays.asList(surface), new CameraCaptureSession.StateCallback() {
                                    @Override
                                    public void onConfigured(@NonNull CameraCaptureSession session) {
                                        try {
                                            CaptureRequest.Builder builder = camera.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
                                            builder.addTarget(surface);
                                            CaptureRequest captureRequest = builder.build();
                                            session.setRepeatingRequest(captureRequest, new CameraCaptureSession.CaptureCallback() {
                                                @Override
                                                public void onCaptureStarted(@NonNull CameraCaptureSession session, @NonNull CaptureRequest request, long timestamp, long frameNumber) {
                                                    super.onCaptureStarted(session, request, timestamp, frameNumber);
                                                }
                                            }, null);
                                        } catch (CameraAccessException e) {
                                            e.printStackTrace();
                                        }
                                    }

                                    @Override
                                    public void onConfigureFailed(@NonNull CameraCaptureSession session) {

                                    }
                                }, null);
                            } catch (CameraAccessException e) {
                                e.printStackTrace();
                            }
                        }

                        @Override
                        public void onDisconnected(@NonNull CameraDevice camera) {

                        }

                        @Override
                        public void onError(@NonNull CameraDevice camera, int error) {

                        }
                    }, null);
                } catch (CameraAccessException e) {
                    e.printStackTrace();
                }
            }

            @Override
            public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

            }

            @Override
            public void surfaceDestroyed(SurfaceHolder holder) {

            }
        });
    }
}

為Fragment添加一個接口，是能在MainActivity下找到Fragment下的子控件View

為Fragment添加一個接口，是能在MainActivity下找到Fragment下的子控件View

public class F1 extends Fragment {

    private View view;

    public Find_button find_button;

    public void getFind_button(Find_button find_button) {

        this.find_button = find_button;

    }

    @Override

    public void onCreate(@Nullable Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

    }

    @Nullable

    @Override

    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {

        super.onCreateView(inflater, container, savedInstanceState);

        view = inflater.inflate(R.layout.f1, null);

        return view;

    }

    @Override

    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {

        super.onViewCreated(view, savedInstanceState);

        find_button.button(view);

    }

}

interface Find_button {

    void button(View view);

}

-----------------------------------

public class MainActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        addf1();

    }

    protected void addf1() {

        FragmentManager fragmentManager = getFragmentManager();

        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

        F1 f1 = new F1();

        fragmentTransaction.add(R.id.f1, f1, "f1");

        fragmentTransaction.commit();

        f1.getFind_button(new Find_button() {

            @Override

            public void button(View view) {

                final Button button = view.findViewById(R.id.button);

                button.setOnClickListener(new View.OnClickListener() {

                    @Override

                    public void onClick(View v) {

                        button.setText("F1.Button");

                        Toast.makeText(MainActivity.this, "F1.Button", Toast.LENGTH_SHORT).show();

                    }

                });

            }

        });

    }

}

Creating a Custom Toast View

Creating a Custom Toast View
创建自定义Toast视图

 LayoutInflater layoutInflater = getLayoutInflater();

 View view = layoutInflater.inflate(R.layout.toastlayout ,null);

 TextView textView = view.findViewById(R.id.tx);

 textView.setText("Creating a Custom Toast View");

 Toast toast = new Toast(getContext());

 toast.setView(view);

 toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);

 toast.setDuration(Toast.LENGTH_LONG);

 toast.show();

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

    <ImageView

        android:id="@+id/imageView"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_weight="1"

        app:srcCompat="@android:drawable/btn_dialog" />

    <TextView

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:id="@+id/tx"/>

</LinearLayout>

android adb 複数TCPIP链接

android adb 複数TCPIP链接


C:\> adb -s cc1394de tcpip 5555
restarting in TCP mode port: 5555

C:\> adb connect 192.168.11.111:5555
connected to 192.168.11.111:5555

C:\> adb devices
List of devices attached
192.168.11.111:5555     device
192.168.11.109:5556     device

BroadcastReceiver 监听

protected void bttest() {
    BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

    BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            switch (intent.getAction()) {
                case BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED:
                    int x = intent.getIntExtra(BluetoothAdapter.EXTRA_CONNECTION_STATE, 99);
                    if (x == BluetoothAdapter.STATE_CONNECTED) {
                        System.out.println("--------------2222222222222222------4-----");
                        BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                        System.out.println(device.getAddress());
                        System.out.println(device.getName());
                        System.out.println(device.getBondState());
                        System.out.println(device.getBluetoothClass());
                    }

                    break;
                case BluetoothAdapter.ACTION_STATE_CHANGED:
                    //Bluetooth has been turned on or off.
                    System.out.println("---------ACTION_STATE_CHANGED---------------------------------------------");
                    System.out.println(intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, 22));
                    break;

                case BluetoothAdapter.ACTION_DISCOVERY_FINISHED:
                    System.out.println("--------本地蓝牙适配器已完成设备发现过程。----------------");
                    break;

                case BluetoothAdapter.ACTION_DISCOVERY_STARTED:
                    System.out.println("-------------本地蓝牙适配器已启动远程设备发现过程。------------");
                    break;
                   
                case BluetoothDevice.ACTION_FOUND:
                    System.out.println("---------------------发现远程设备。---------------------");
                    System.out.println(intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE));
                    BluetoothDevice bluetoothDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                    System.out.println(bluetoothDevice.getName());
                    System.out.println(bluetoothDevice.getAddress());
                    break;
            }
        }
    };

    IntentFilter intentFilter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
    IntentFilter intentFilter1 = new IntentFilter(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED);
    IntentFilter intentFilter2 = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
    IntentFilter intentFilter3 = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
    IntentFilter intentFilter4 = new IntentFilter(BluetoothDevice.ACTION_FOUND);
    registerReceiver(broadcastReceiver, intentFilter);
    registerReceiver(broadcastReceiver, intentFilter1);
    registerReceiver(broadcastReceiver, intentFilter2);
    registerReceiver(broadcastReceiver, intentFilter3);
    registerReceiver(broadcastReceiver, intentFilter4);
}

WifiManager.NETWORK_STATE_CHANGED_ACTION

监听WIFI

protected void t1() {
    BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            System.out.println("-----------------------------------3---------------");
            System.out.println(intent.getAction());
            if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(action)) {
                wifiManager = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);
                if (wifiManager.isWifiEnabled()) {
                    Get_IP();
                    To_Notification_Wifi();
                }
            }
        }
    };
    IntentFilter intentFilter = new IntentFilter(WifiManager.NETWORK_STATE_CHANGED_ACTION);
    registerReceiver(broadcastReceiver, intentFilter);
}

Wifi 一覧

Wifi 一覧


<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />


protected void show_wifi_ssid() {
    WifiManager wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
    if (wifiManager.isWifiEnabled()) {
        List<ScanResult> scanResults = wifiManager.getScanResults();
        for (ScanResult x : scanResults) {
            System.out.println("--------------------------------------------");
            System.out.println(x.toString());
            System.out.println(x.BSSID);
            System.out.println(x.SSID);
            System.out.println(x.capabilities);
        }
    } else {
        Toast.makeText(this, "WifiNull", Toast.LENGTH_SHORT).show();
    }
}



I/System.out: SSID: AirPort61998, BSSID: 34:76:c5:5e:f2:2e, capabilities: [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][WPS][ESS], level: -87, frequency: 2432, timestamp: 413176363535, distance: ?(cm), distanceSd: ?(cm), wpsState :configured, wpsDeviceName :I-O DATA 802.11n AP Router
I/System.out: 34:76:c5:5e:f2:2e
I/System.out: AirPort61998
I/System.out: [WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][WPS][ESS]