public class MainActivity extends AppCompatActivity {
    TextView editText;
@Override
public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editText = findViewById(R.id.editText);
Button startButton = findViewById(R.id.startButton
 
);
startButton.setOnClickListener(new View.OnClickListener(){
            public void onClick(View v) {
                do_exec("sh /system/a.sh");
}
        });
}

    String do_exec(String cmd) {
        String s = "\n";
        try {
            Process p = Runtime.getRuntime().exec(cmd);
BufferedReader in = new 
 
BufferedReader(
                    new InputStreamReader(p.getInputStream()));
String line = "";
            while ((line = in.readLine()) != null) {
                System.out.println(line);
s += line + "/n";
}
        } catch (IOException e) {
            e.printStackTrace();
}
        editText.setText(s);
 
        return cmd;
}


}

xml頁面就是一個TextView 和一個按鈕

點選按鈕，執行shell指令碼。

注意：

1.手機必須root

2.shell指令碼需要放在/system目錄下，並且chmod 777 a.sh，確認成功後才可以執行