蓝牙开关与手机蓝牙开关联动

1.写资源文件

2.在layout中引用资源

3.在onResume判断蓝牙是否开启

bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
blueToothState = bluetoothAdapter.isEnabled();
SharedPreferences sp = getSharedPreferences("shezhi", MODE_PRIVATE);
SharedPreferences.Editor edit = sp.edit();
if (blueToothState) {switch_button1.setChecked(true);edit.putBoolean("iscall", true);edit.commit();
} else {switch_button1.setChecked(false);edit.putBoolean("iscall", false);edit.commit();
}

4.写点击方法

private void ivbutton(){SharedPreferences sp = getSharedPreferences("shezhi", MODE_PRIVATE);boolean iscall = sp.getBoolean("iscall", true);if(iscall){switch_button1.setChecked(true);}else {switch_button1.setChecked(false);}switch_button1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {if(switch_button1.isChecked()){bluetoothAdapter.enable();Toast.makeText(DeviceScanActivity.this,"蓝牙已打开",Toast.LENGTH_SHORT).show();}else{bluetoothAdapter.disable();Toast.makeText(DeviceScanActivity.this,"蓝牙已关闭",Toast.LENGTH_SHORT).show();}}});
}

5.在onCreate里调用方法

ivbutton（）；

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