Android可自定義顯示時長的Toast

package lab.sodino.customtoast;
import lab.sodino.util.SodinoOut;
import android.content.Context;
import android.os.Handler;
import android.widget.Toast;
/**設計原理：在Toast顯示消失之前，再次調用Toast.show()進行接力。*/
public class CustomToast {
/** 用於測試 */
private int showCount = 1;
private Toast toast = null;
private Context context;
private Handler handler = null;
private Runnable toastThread = new Runnable() {
public void run() {
// 遞增的count明顯地表明是不斷運行新的Toast.show()的結果。
toast.setText(String.valueOf(showCount++) + "CustomToast");
toast.show();
// 3.3秒後再度重啟，設為4s的話將會看到Toast是斷斷續續地顯示著的。
handler.postDelayed(toastThread, 3300);
}
};
public CustomToast(Context context) {
this.context = context;
handler = new Handler(this.context.getMainLooper());
toast = Toast.makeText(this.context, "", Toast.LENGTH_LONG);
}
public void setText(String text) {
toast.setText(text);
}
public void showToast(final long length) {
handler.post(toastThread);
SodinoOut.out("Handler post at:" + System.currentTimeMillis());
Thread timeThread = new Thread() {
public void run() {
SodinoOut.out("TimeThread start at:"
+ System.currentTimeMillis());
try {
Thread.sleep(length);
} catch (InterruptedException e) {
e.printStackTrace();
}
CustomToast.this.stopToast();
SodinoOut
.out("Toast canceled at:" + System.currentTimeMillis());
}
};
timeThread.start();
}
public void stopToast() {
// 刪除Handler隊列中的仍處理等待的消息元素刪除
handler.removeCallbacks(toastThread);
// 撤掉仍在顯示的Toast
toast.cancel();
}
}