创建访问 oncreate() 对象的用户定义方法

Question

我正在尝试开发一个应用程序，其中我有一组代码，每次按下 5 个按钮中的一个按钮时都必须调用这些代码。只有与之关联的要打开的文件的 id 发生变化所以我需要创建一个方法来访问在 onCreate() 中创建的所有对象，如按钮等。

public class Aero extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub

    super.onCreate(savedInstanceState);
    setContentView(R.layout.aero);
    final SlidingDrawer slider = (SlidingDrawer) findViewById(R.id.slidingDrawer1);
    final TextView secondyear = (TextView) findViewById(R.id.ae2yrsyll);
    final ScrollView scrl = (ScrollView) findViewById(R.id.scrollView1);
    Button one = (Button) findViewById(R.id.ae_three_sem_am3);
    Button two = (Button) findViewById(R.id.ae_three_sem_at);
    Button three = (Button) findViewById(R.id.ae_three_sem_fmm);
    Button four = (Button) findViewById(R.id.ae_three_sem_cp);
    Button five = (Button) findViewById(R.id.ae_three_sem_ea);
    one.setOnClickListener(new OnClickListener() {

        public void mymethod(int resourse) {
            scrl.pageScroll(View.FOCUS_UP);
            InputStream is = getResources().openRawResource(resourse);
            BufferedReader br = new BufferedReader(
                    new InputStreamReader(is));
            String line;
            String entireFile = "";
            try {
                while ((line = br.readLine()) != null) { // <--------- place
                                                            // readLine()
                                                            // inside loop
                    entireFile += (line + "\n"); // <---------- add each
                                                    // line to entireFile
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            secondyear.setText(entireFile); // <------- assign entireFile to
                                            // TextView
            if (slider.isOpened()) {
                slider.close();
            }
        }

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            scrl.pageScroll(View.FOCUS_UP);
            InputStream is = getResources().openRawResource(R.raw.aero1);
            BufferedReader br = new BufferedReader(
                    new InputStreamReader(is));
            String line;
            String entireFile = "";
            try {
                while ((line = br.readLine()) != null) { // <--------- place
                                                            // readLine()
                                                            // inside loop
                    entireFile += (line + "\n"); // <---------- add each
                                                    // line to entireFile
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            secondyear.setText(entireFile); // <------- assign entireFile to
                                            // TextView
            if (slider.isOpened()) {
                slider.close();
            }
        }
    });

    two.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            scrl.pageScroll(View.FOCUS_UP);
            InputStream is = getResources().openRawResource(R.raw.aero2);
            BufferedReader br = new BufferedReader(
                    new InputStreamReader(is));
            String line;
            String entireFile = "";
            try {
                while ((line = br.readLine()) != null) { // <--------- place
                                                            // readLine()
                                                            // inside loop
                    entireFile += (line + "\n"); // <---------- add each
                                                    // line to entireFile
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            secondyear.setText(entireFile); // <------- assign entireFile to
                                            // TextView
            if (slider.isOpened()) {
                slider.close();
            }
        }
    });
    three.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            scrl.pageScroll(View.FOCUS_UP);
            InputStream is = getResources().openRawResource(R.raw.aero3);
            BufferedReader br = new BufferedReader(
                    new InputStreamReader(is));
            String line;
            String entireFile = "";
            try {
                while ((line = br.readLine()) != null) { // <--------- place
                                                            // readLine()
                                                            // inside loop
                    entireFile += (line + "\n"); // <---------- add each
                                                    // line to entireFile
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            secondyear.setText(entireFile); // <------- assign entireFile to
                                            // TextView
            if (slider.isOpened()) {
                slider.close();
            }
        }
    });
    four.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            scrl.pageScroll(View.FOCUS_UP);
            InputStream is = getResources().openRawResource(R.raw.aero4);
            BufferedReader br = new BufferedReader(
                    new InputStreamReader(is));
            String line;
            String entireFile = "";
            try {
                while ((line = br.readLine()) != null) { // <--------- place
                                                            // readLine()
                                                            // inside loop
                    entireFile += (line + "\n"); // <---------- add each
                                                    // line to entireFile
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            secondyear.setText(entireFile); // <------- assign entireFile to
                                            // TextView
            if (slider.isOpened()) {
                slider.close();
            }
        }
    });
    five.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            scrl.pageScroll(View.FOCUS_UP);
            InputStream is = getResources().openRawResource(R.raw.aero5);
            BufferedReader br = new BufferedReader(
                    new InputStreamReader(is));
            String line;
            String entireFile = "";
            try {
                while ((line = br.readLine()) != null) { // <--------- place
                                                            // readLine()
                                                            // inside loop
                    entireFile += (line + "\n"); // <---------- add each
                                                    // line to entireFile
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            secondyear.setText(entireFile); // <------- assign entireFile to
                                            // TextView
            if (slider.isOpened()) {
                slider.close();
            }
        }
    });

因此我想创建一个名为 myMethod 的方法，如下所示

myMethod(int reso){scrl.pageScroll(View.FOCUS_UP);
            InputStream is = getResources().openRawResource(reso);
            BufferedReader br = new BufferedReader(
                    new InputStreamReader(is));
            String line;
            String entireFile = "";
            try {
                while ((line = br.readLine()) != null) { // <--------- place
                                                            // readLine()
                                                            // inside loop
                    entireFile += (line + "\n"); // <---------- add each
                                                    // line to entireFile
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            secondyear.setText(entireFile); // <------- assign entireFile to
                                            // TextView
            if (slider.isOpened()) {
                slider.close();
            }}

我应该把这个方法放在哪里？请帮忙

Answer 1

只需将您的视图保存到 Activity 中的变量中并访问它们。

public class Aero extends Activity {

    TextView mSecondYear;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.aero);
        mSecondYear = (TextView) findViewById(R.id.ae2yrsyll);
        ...
    }

    public void myMethod() {
        mSecondYear.setText("bla");
    }
}

创建访问 oncreate() 对象的用户定义方法

create user defined methods that access objects of oncreate()

methods

android

oncreate