Android显示电量——自定义电池View

蔚落 2022-10-02 04:53 279阅读 0赞

[2019独角兽企业重金招聘Python工程师标准>>> ][2019_Python_] ![hot3.png][]

源码下载地址:[http://download.csdn.net/detail/feifei454498130/6462989][http_download.csdn.net_detail_feifei454498130_6462989]

本文原创转载请注明地址:[http://blog.csdn.net/feifei454498130/article/details/13282317][http_blog.csdn.net_feifei454498130_article_details_13282317]

简单实现的一个显示电池的电量的View，具体看代码

public class MainActivity extends Activity { BatteryView mBatteryView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mBatteryView = (BatteryView) findViewById(R.id.battery_view); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; } @Override protected void onResume() { super.onResume(); register(); } @Override protected void onPause() { super.onPause(); unregister(); } private void register() { registerReceiver(batteryChangedReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED)); } private void unregister() { unregisterReceiver(batteryChangedReceiver); } // 接受广播 private BroadcastReceiver batteryChangedReceiver = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { if (Intent.ACTION_BATTERY_CHANGED.equals(intent.getAction())) { int level = intent.getIntExtra("level", 0); int scale = intent.getIntExtra("scale", 100); int power = level * 100 / scale; Log.d("Deom", "电池电量：:" + power); mBatteryView.setPower(power); } } }; }

public class BatteryView extends View{ private int mPower = 100; public BatteryView(Context context) { super(context); } public BatteryView(Context context, AttributeSet attrs) { super(context, attrs); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); int battery_left = 0; int battery_top = 0; int battery_width = 25; int battery_height = 15; int battery_head_width = 3; int battery_head_height = 3; int battery_inside_margin = 3; //先画外框 Paint paint = new Paint(); paint.setColor(Color.BLACK); paint.setAntiAlias(true); paint.setStyle(Style.STROKE); Rect rect = new Rect(battery_left, battery_top, battery_left + battery_width, battery_top + battery_height); canvas.drawRect(rect, paint); float power_percent = mPower / 100.0f; Paint paint2 = new Paint(paint); paint2.setStyle(Style.FILL); //画电量 if(power_percent != 0) { int p_left = battery_left + battery_inside_margin; int p_top = battery_top + battery_inside_margin; int p_right = p_left - battery_inside_margin + (int)((battery_width - battery_inside_margin) * power_percent); int p_bottom = p_top + battery_height - battery_inside_margin * 2; Rect rect2 = new Rect(p_left, p_top, p_right , p_bottom); canvas.drawRect(rect2, paint2); } //画电池头 int h_left = battery_left + battery_width; int h_top = battery_top + battery_height / 2 - battery_head_height / 2; int h_right = h_left + battery_head_width; int h_bottom = h_top + battery_head_height; Rect rect3 = new Rect(h_left, h_top, h_right, h_bottom); canvas.drawRect(rect3, paint2); } public void setPower(int power) { mPower = power; if(mPower < 0) { mPower = 0; } invalidate(); } }

效果如下:

![25231201_pDhl.jpg][]

源码下载地址:[http://download.csdn.net/detail/feifei454498130/6462989][http_download.csdn.net_detail_feifei454498130_6462989]

转载于:https://my.oschina.net/lendylongli/blog/226765

[2019_Python_]: https://my.oschina.net/u/2663968/blog/3061697
[hot3.png]: /images/20220113/b7a405fe17ea43ada8a70b8e7b7fe5e3.png
[http_download.csdn.net_detail_feifei454498130_6462989]: http://download.csdn.net/detail/feifei454498130/6462989
[http_blog.csdn.net_feifei454498130_article_details_13282317]: http://blog.csdn.net/feifei454498130/article/details/13282317
[25231201_pDhl.jpg]: /images/20220113/e320f19b183b4bafa31da9069e4cdf89.png