大家好我需要实现以下目标：
我只有一个类，我把所有东西都变成动态的，这样我就可以在一个文件中有多个活动。 当用户进入应用程序时，它显示一个列表，在他选择它之后，他选择其中一个并显示图像并开始播放音频文件，在同一个窗口中我有下一个和上一个按钮。
而不是我需要滑动才能实现的下一个和上一个按钮如何实现它。这是我的下一个和上一个的代码
if (v == previous) {
v.startAnimation(AnimationUtils.loadAnimation(this, R.anim.image_click));
if (i == 0) {
playoverready.setText(" ");
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("No previous points as this is the first point");
builder.setCancelable(true);
builder.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
// TODO Auto-generated method stub
dialog.cancel();
}
});
builder.create().show();
//previous.setEnabled(false);
} else {
handler.removeCallbacks(r);
handler.removeCallbacks(rprv);
handler.removeCallbacks(rn);
handler.removeCallbacks(playisover);
record.setEnabled(false);
play.setEnabled(false);
replay.setEnabled(false);
display.setText(" ");
playoverready.setText(" ");
indicator.setText(" ");
System.out.println("buttons are disabled...");
handler.postDelayed(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
next.setImageResource(R.drawable.next);
}
},1000);
i--;
img.setBackgroundResource(imgNum[i]);
if (apple.isPlaying()) {
apple.stop();
}
if (female.isPlaying()) {
female.stop();
if (mp.isPlaying()) {
mp.pause();
mp.seekTo(-5);
}
}
apple = MediaPlayer.create(this, mediaNum[i]);
handler.postDelayed(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
apple.start();
record.setEnabled(false);
play.setEnabled(false);
replay.setEnabled(false);
}
}, 2000);
rprv = new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
record.setEnabled(true);
play.setEnabled(true);
replay.setEnabled(true);
indicator.setText("Start Practise");
System.out.println("buttons are enabled first...");
}
};
handler.postDelayed(rprv, (apple.getDuration()) + 2500);
if (mp.isPlaying()) {
mp.pause();
mp.seekTo(-5);
//mp.stop();
/*mp=null;
mp.release();*/
}
display.setText("");
if(rec == true){
rec = false;
record.setImageResource(R.drawable.record);
recorder.stop();
recorder.release();
}
}
}
case R.id.bnext:
v.startAnimation(AnimationUtils.loadAnimation(this, R.anim.image_click));
i++;
if (i >= noOfQues) {
playoverready.setText(" ");
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("You are already in the last point");
builder.setCancelable(true);
builder.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
// TODO Auto-generated method stub
dialog.cancel();
}
});
builder.create().show();
//next.setEnabled(false);
i--;
} else {
handler.removeCallbacks(r);
handler.removeCallbacks(rprv);
handler.removeCallbacks(rn);
handler.removeCallbacks(playisover);
record.setEnabled(false);
play.setEnabled(false);
replay.setEnabled(false);
display.setText(" ");
playoverready.setText(" ");
indicator.setText(" ");
System.out.println("entered buttons are disabled...");
img.setBackgroundResource(imgNum[i]);
if (apple.isPlaying()) {
apple.stop();
}
if (female.isPlaying()) {
female.stop();
if (mp.isPlaying()) {
mp.pause();
mp.seekTo(-5);
}
}
apple = MediaPlayer.create(this, mediaNum[i]);
handler.postDelayed(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
apple.start();
record.setEnabled(false);
play.setEnabled(false);
replay.setEnabled(false);
}
}, 2000);
rn = new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
record.setEnabled(true);
play.setEnabled(true);
replay.setEnabled(true);
indicator.setText("Start Practise");
System.out.println("buttons are enabled first...");
}
};
handler.postDelayed(rn, (apple.getDuration()) + 2500);
previous.setEnabled(true);
next.setEnabled(true);
if (mp.isPlaying()) {
mp.pause();
mp.seekTo(-5);
//mp.stop();
/*mp=null;
mp.release();*/
}
display.setText("");
if(rec == true){
rec = false;
record.setImageResource(R.drawable.record);
recorder.stop();
recorder.release();
}
}
break;
提前感谢任何帮助
答案 0 :(得分：0)