[英]Any way to run shell commands on android programmatically?
有沒有辦法在我的應用程序上運行終端命令,然后訪問我的 UI 上的數據? 具體top
。
以日志收集器為例。 這是相關文件。
關鍵在這里:
ArrayList<String> commandLine = new ArrayList<String>();
commandLine.add("logcat");//$NON-NLS-1$
[...]
Process process = Runtime.getRuntime().exec(commandLine);
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
好的,這對我有用,以防將來有人需要它...... :)
圍繞嘗試和捕捉
try {
Process process = Runtime.getRuntime().exec("top -n 1 -d 1");
BufferedReader in = new BufferedReader(new InputStreamReader(process.getInputStream()));
} catch (InterruptedException e) {
e.printStackTrace();
}
我們,可以執行如下命令,我成功地做到了......! 試試這樣,這里我們需要指定命令的完整路徑。 獲取命令的完整路徑,在你的終端(android)輸入
*$ which ls
/系統/斌*
try {
// Executes the command.
Process process = Runtime.getRuntime().exec("/system/bin/ls /sdcard");
// Reads stdout.
// NOTE: You can write to stdin of the command using
// process.getOutputStream().
BufferedReader reader = new BufferedReader(
new InputStreamReader(process.getInputStream()));
int read;
char[] buffer = new char[4096];
StringBuffer output = new StringBuffer();
while ((read = reader.read(buffer)) > 0) {
output.append(buffer, 0, read);
}
reader.close();
// Waits for the command to finish.
process.waitFor();
return output.toString();
} catch (IOException e) {
throw new RuntimeException(e);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
它還取決於您在終端中運行的內容……如果您在文件上運行“cat”,您也可以這樣做。
final private String MEM_FILE = "/proc/meminfo";
public Long readMem() {
String[] segs;
FileReader fstream;
try {
fstream = new FileReader(MEM_FILE);
} catch (FileNotFoundException e) {
Log.e("readMem", "Could not read " + MEM_FILE);
return false;
}
BufferedReader in = new BufferedReader(fstream, 500);
String line;
try {
while ((line = in.readLine()) != null) {
if (line.indexOf("MemTotal:") > 0) {
Log.e("MemTotal", line);
segs = line.trim().split("[ ]+");
memTotal = Long.parseLong(segs[1]);
}
if (line.indexOf("MemFree:") > 0) {
Log.e("MemFree", line);
segs = line.trim().split("[ ]+");
memFree = Long.parseLong(segs[1]);
}
}
updateMem(); //call function to update textviews or whatever
return true;
} catch (IOException e) {
Log.e("readMem", e.toString());
}
return false;
}
編輯:在名為 netmeter 的 android 實驗室項目中有一個完美的例子。 有一個名為 Top.java 的類實際上完全符合您的要求,它在 TaskList.java 中用於顯示。 http://code.google.com/p/android-labs/source/browse/#svn/trunk/NetMeter/src/com/google/android/netmeter
對於 Kotlin 愛好者,可以使用以下
fun executeShell() {
val command: String = "top -n 1"
try {
val process: Process = Runtime.getRuntime().exec(command)
// Read the lines using BufferedReader
BufferedReader(InputStreamReader(process.inputStream)).forEachLine {
// Do something on each line read
Log.d(this::class.java.canonicalName, "$it")
}
} catch (e: InterruptedException) {
Log.w(this::class.java.canonicalName, "Cannot execute command [$command].", e)
} catch (e: Exception) {
Log.e(this::class.java.canonicalName, "Cannot execute command [$command].", e)
}
}
您甚至不必關閉緩沖區,因為forEachLine擴展函數會處理它。
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