java - 自动顺序显示图像

Question

我使用下面的代码通过单击按钮顺序显示图像。现在我想在特定时间段后自动显示这些图像。它们应该在特定时间之后以及需要在同一代码中添加的地方显示和更改。

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.ImageView;


public class MainActivity extends AppCompatActivity {

private static ImageView imgView;
private static Button ButtonSbm;
private int current_image_index;
int [] images={R.mipmap.ic_launcher,R.mipmap.ic_launcher1};
@Override

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    FloatingActionButton fab=(FloatingActionButton)findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
Snackbar.make(view, "Replace with your own action",Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }
    });
    buttonClick();
}
public void buttonClick(){
imgView =(ImageView)findViewById(R.id.imageView);
ButtonSbm=(Button)findViewById(R.id.button);
ButtonSbm.setOnClickListener(
        new View.OnClickListener(){
        public void onClick(View v){
            current_image_index++;
            current_image_index=current_image_index %images.length;
                    imgView.setImageResource(images[current_image_index]);
        }
        }

    );

  }
@Override
   public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
 }

@Override
 public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
 }
 }

Answer 1

您好，您可以使用以下代码

public class TestService extends IntentService {
    Context ctx;
    private CountDownTimer countDownTimer;

    public static final String Tag="TestService";
    private long startTime= 2 * 1000;
    int index = 0;
    private final long interval = 1 * 1000;
    public TestService() {
        super("TestService");
        // TODO Auto-generated constructor stub
    }

    @Override
    protected void onHandleIntent(Intent intent) {

            countDownTimer = new MyCountDownTimer(startTime, interval);
            countDownTimer.start();
            Looper.loop();

        }

        public class MyCountDownTimer extends CountDownTimer {
            public MyCountDownTimer(long startTime, long interval) {
                super(startTime, interval);
            }

            @Override
            public void onFinish() {

                // do as per you required
            }

            @Override
            public void onTick(long millisUntilFinished) {
                Log.v(Tag,"Inside OnTick()");
                    // do as per you required
            }
        }


}