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#android講座BatteryManagerの使い方.
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This video shows you how to use Battery Manager. Since <> cannot be used on YouTube, I make it full-width as usual. When copying, please use it after making it half-width. Click here for the source ↓ (Strings.xml) step03 string> Start string> resources> (MainActivity.java) package com. example.step03; import androidx.appcompat.app.AppCompatActivity; import android.content.Intent; import android.os.Bundle; import android.view.View; public class MainActivity extends AppCompatActivity @Override protected void onCreate (Bundle savedInstanceState) super.onCreate (savedInstanceState); setContentView (R.layout.activity_main); // Press the start button and public void set (View view) // screen transition Intent intent = new Intent (getApplication (), SubActivity.class) ; // go startActivity (intent); (activity_main.xml) xml version = "1.0" encoding = "utf-8"?> (SubActivity.java) package com.example.step03; import android.content.Intent; import android.content.IntentFilter; import android.os.BatteryManager; import android.os.Bundle; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; public class SubActivity extends AppCompatActivity // for remaining battery int pst; int level; @Override protected void onCreate (Bundle savedInstanceState) super.onCreate (savedInstanceState); setContentView (R.layout.activity_sub); pst = Bzan (); TextView textView = findViewById (R.id.textView); textView.setText (“Battery is” + pst + “%. “); // Check the remaining battery level private int Bzan () IntentFilter ifilter = new IntentFilter (Intent.ACTION_BATTERY_CHANGED); // Intent batteryStatus = this.registerReceiver (null, ifilter); if (batteryStatus! = null ) level = batteryStatus.getIntExtra (BatteryManager.EXTRA_LEVEL, -1); // Battery level return level; (activity_sub.xml) xml version = "1.0" encoding = "utf-8"?> < androidx.constraintlayout.widget.ConstraintLayout xmlns: android = "xmlns: app =" xmlns: tools = "android: layout_width =" match_parent "android: layout_height =" match_parent "tools: context =". SubActivity "> androidx.constraintlayout.widget.ConstraintLayout >..