package zhangphil.adb;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.content.IntentFilter;

import android.os.BatteryManager;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.TextView;

import java.text.SimpleDateFormat;

import java.util.Date;

public class MainActivity extends AppCompatActivity {

private String TAG = "USB连接状态";

private final static String USB_ACTION = "android.hardware.usb.action.USB_STATE";

private TextView text;

private String string = "";

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

text = findViewById(R.id.text);

IntentFilter filter = new IntentFilter();

filter.addAction(Intent.ACTION_BATTERY_CHANGED);

filter.addAction(Intent.ACTION_BATTERY_LOW);

filter.addAction(Intent.ACTION_BATTERY_OKAY);

filter.addAction(Intent.ACTION_POWER_CONNECTED);

filter.addAction(Intent.ACTION_POWER_DISCONNECTED);

filter.addAction(USB_ACTION);

registerReceiver(mBroadcastReceiver, filter);

registerReceiver(mBroadcastReceiver, new IntentFilter(USB_ACTION));

}

@Override

protected void onDestroy() {

super.onDestroy();

unregisterReceiver(mBroadcastReceiver);

}

private void displayMsg(String s) {

SimpleDateFormat sdf = new SimpleDateFormat("MM-dd HH:mm:ss:SSS");

string = string + sdf.format(new Date()) + "\t\t" + s + "\n";

text.setText(string);

}

private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {

@Override

public void onReceive(Context context, Intent intent) {

String action = intent.getAction();

switch (action) {

case USB_ACTION:

boolean connected = intent.getExtras().getBoolean("connected");

if (connected) {

displayMsg("USB已连接");

} else {

displayMsg("USB未连接");

}

break;

case Intent.ACTION_BATTERY_CHANGED:

//电量发生改变。

displayMsg("电量发生改变");

boolean isCharging = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1) != 0;

if (isCharging) {

//剩余电量。

int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);

//电量最大值。

int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);

//电量百分比。

float batteryPct = level / (float) scale;

displayMsg("充电," + level + "-" + batteryPct + "-" + scale);

}

break;

case Intent.ACTION_BATTERY_LOW:

displayMsg("电量过低");

break;

case Intent.ACTION_BATTERY_OKAY:

displayMsg("电量满");

break;

case Intent.ACTION_POWER_CONNECTED:

displayMsg("电源接通");

break;

case Intent.ACTION_POWER_DISCONNECTED:

displayMsg("电源断开");

break;

}

}

};

}