Android 实现快速对CPU的压榨demo源码

package com.hjly.performancetestdemo; import android.Manifest; import android.content.DialogInterface; import android.content.Intent; import android.content.pm.PackageManager; import android.os.Build; import android.os.Bundle; import android.os.Environment; import android.os.Handler; import android.provider.Settings; import android.util.Log; import android.widget.Toast; import androidx.appcompat.app.AlertDialog; import androidx.appcompat.app.AppCompatActivity; import androidx.core.app.ActivityCompat; import com.hjly.performancetestdemo.databinding.ActivityMainBinding; import java.math.BigDecimal; public class MainActivity extends AppCompatActivity { private ActivityMainBinding binding; private Handler handler; private Runnable runnable; private Runnable runnable_loop; private String storage_can_use; private float cpu_rate = 0; private AlertDialog dialog; private static final int REQUEST_EXTERNAL_STORAGE = 1; private static String[] PERMISSIONS_STORAGE = { Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE }; private boolean havePermission = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); binding = ActivityMainBinding.inflate(getLayoutInflater()); setContentView(binding.getRoot()); handler = new Handler(); updateData(); binding.btn50Cpu.setOnClickListener(view -> { if (!havePermission) { return; } createLoop(); createLoop(); createLoop(); createLoop(); }); } @Override protected void onResume() { super.onResume(); checkPermission(); } private void checkPermission() { //检查权限（NEED_PERMISSION）是否被授权 PackageManager.PERMISSION_GRANTED表示同意授权 if (Build.VERSION.SDK_INT >= 30) { if (!Environment.isExternalStorageManager()) { if (dialog != null) { dialog.dismiss(); dialog = null; } dialog = new AlertDialog.Builder(this) .setTitle("提示")//设置标题 .setMessage("请开启文件访问权限，否则无法正常使用本应用！") .setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int i) { dialog.dismiss(); } }) .setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); Intent intent = new Intent(Settings.ACTION_MANAGE_ALL_FILES_ACCESS_PERMISSION); startActivity(intent); } }).create(); dialog.show(); } else { havePermission = true; Log.i("swyLog", "Android 11以上，当前已有权限"); } } else { if (Build.VERSION.SDK_INT > Build.VERSION_CODES.M) { if (ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { //申请权限 if (dialog != null) { dialog.dismiss(); dialog = null; } dialog = new AlertDialog.Builder(this) .setTitle("提示")//设置标题 .setMessage("请开启文件访问权限，否则无法正常使用本应用！") .setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); ActivityCompat.requestPermissions(MainActivity.this, PERMISSIONS_STORAGE, REQUEST_EXTERNAL_STORAGE); } }).create(); dialog.show(); } else { havePermission = true; Log.i("swyLog", "Android 6.0以上，11以下，当前已有权限"); } } else { havePermission = true; Log.i("swyLog", "Android 6.0以下，已获取权限"); } } } @Override public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); switch (requestCode) { case REQUEST_EXTERNAL_STORAGE: { if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { havePermission = true; Toast.makeText(this, "授权成功！", Toast.LENGTH_SHORT).show(); } else { havePermission = false; Toast.makeText(this, "授权被拒绝！", Toast.LENGTH_SHORT).show(); } return; } } } private void createLoop() { new Thread(new Runnable() { @Override public void run() { while (true) { TestProcess.writePng(MainActivity.this); Log.i("swyLog", "cpu_rate is : " + cpu_rate); } } }).start(); } public void updateData() { if (null != handler && runnable != null) { handler.removeCallbacks(runnable); runnable = null; } runnable = new Runnable() { @Override public void run() { refreshParams(); handler.postDelayed(this, (1 * 1000)); } }; handler.post(runnable); } private void refreshParams() { storage_can_use = Utils.getAvailMemory(); String storage_total = Utils.getTotalMemory(); cpu_rate = Utils.getCpuUsed(); boolean outside_available = Utils.isExternalStorageAvailable(); String inside_can_use = Utils.getAvailableInternalMemorySize(); String inside_total = Utils.getTotalInternalMemorySize(); String outside_can_use = Utils.getAvailableExternalMemorySize(); String outside_total = Utils.getTotalExternalMemorySize(); binding.tvStorageCanUse.setText(!"".equals(storage_can_use) ? storage_can_use : ""); binding.tvStorageTotal.setText(!"".equals(storage_total) ? storage_total : ""); binding.tvInsideCanUse.setText(!"".equals(inside_can_use) ? inside_can_use : ""); binding.tvInsideTotal.setText(!"".equals(inside_total) ? inside_total : ""); binding.tvOutsideCanUse.setText(!"".equals(outside_can_use) ? outside_can_use : ""); binding.tvOutsideTotal.setText(!"".equals(outside_total) ? outside_total : ""); binding.tvCpuRate.setText(formatData((cpu_rate * 100)) + "%"); binding.tvOutsideAvailable.setText(outside_available ? "true" : "false"); } private String formatData(double old) { BigDecimal bigDecimal = new BigDecimal(old); return bigDecimal.setScale(2, BigDecimal.ROUND_HALF_UP).toString(); } @Override protected void onDestroy() { super.onDestroy(); if (runnable != null) { handler.removeCallbacks(runnable); } } }