實現思路?調用系統的killBackgroundProcesses

具體實現如下：

1.配置權限

<uses-permission android:name="android.permission.KILL_BACKGROUND_PROCESSES"/>

2.具體實現流程

public class ClearMemoryActivity extends Activity { private static final String TAG = "ClearMemoryActivity"; /** * Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Button clear = (Button) findViewById(R.id.clear); clear.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //To change body of implemented methods use File | Settings | File Templates. ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE); List<RunningAppProcessInfo> infoList = am.getRunningAppProcesses(); List<ActivityManager.RunningServiceInfo> serviceInfos = am.getRunningServices(100); long beforeMem = getAvailMemory(ClearMemoryActivity.this); Log.d(TAG, "-----------before memory info : " + beforeMem); int count = 0; if (infoList != null) { for (int i = 0; i < infoList.size(); ++i) { RunningAppProcessInfo appProcessInfo = infoList.get(i); Log.d(TAG, "process name : " + appProcessInfo.processName); //importance 該進程的重要程度 分為幾個級別，數值越低就越重要。 Log.d(TAG, "importance : " + appProcessInfo.importance); // 一般數值大于RunningAppProcessInfo.IMPORTANCE_SERVICE的進程都長時間沒用或者空進程了 // 一般數值大于RunningAppProcessInfo.IMPORTANCE_VISIBLE的進程都是非可見進程，也就是在后臺運行著 if (appProcessInfo.importance > RunningAppProcessInfo.IMPORTANCE_VISIBLE) { String[] pkgList = appProcessInfo.pkgList; for (int j = 0; j < pkgList.length; ++j) {//pkgList 得到該進程下運行的包名 Log.d(TAG, "It will be killed, package name : " + pkgList[j]); am.killBackgroundProcesses(pkgList[j]); count++; } } } } long afterMem = getAvailMemory(ClearMemoryActivity.this); Log.d(TAG, "----------- after memory info : " + afterMem); Toast.makeText(ClearMemoryActivity.this, "clear " + count + " process, " + (afterMem - beforeMem) + "M", Toast.LENGTH_LONG).show(); } }); } //獲取可用內存大小 private long getAvailMemory(Context context) { // 獲取android當前可用內存大小 ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); MemoryInfo mi = new MemoryInfo(); am.getMemoryInfo(mi); //mi.availMem; 當前系統的可用內存 //return Formatter.formatFileSize(context, mi.availMem);// 將獲取的內存大小規格化 Log.d(TAG, "可用內存---->>>" + mi.availMem / (1024 * 1024)); return mi.availMem / (1024 * 1024); } }

注意：getRunningAppProcesses()只能獲取到自身app應用的信息，如果要獲取其他應用的信息，需要將該apk設置為 "android.uid.system"?或系統簽名

(220條消息) Android P 性能優化：創建APP進程白名單，殺死白名單之外的進程_killbackgroundprocesses的黑白名單配置_阿迷創客的博客-CSDN博客

(221條消息) Android中殺進程的幾種方法 (1) - killBackgroundProcesses_Jtag特工的博客-CSDN博客_kill_background_processes?

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