ProgressDialog 进度对话框 用法总结 [MD]

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目录

目录

• 目录
• 进度对话框 ProgressDialog 用法总结
  • 创建方式
  • 常用方法
  • 测试代码
    • Mainactivity
    • ProgressDialogFragment

进度对话框 ProgressDialog 用法总结

public class ProgressDialog extends AlertDialog

ProgressDialog 继承自 AlertDialog，AlertDialog 继承自 Dialog

创建方式

ProgressDialog 的创建方式有两种，一种是new ProgressDialog()，一种是调用 ProgressDialog 的静态方法show()创建并显示，这种进度条只能是圆形条。

ProgressDialog dialog = ProgressDialog.show(this, "提示", "正在登陆中…", true, false, null);

常用方法

• setProgressStyle：设置进度条风格，风格为圆形，旋转的。
• setTitlt：设置标题
• setMessage：设置提示信息；
• setIcon：设置标题图标；
• setIndeterminate：设置ProgressDialog 的进度条是否不明确；这个属性对于ProgressDailog默认的转轮模式没有实际意义，默认下设置为true，它仅仅对带有ProgressBar的Dialog有作用。修改这个属性为false后可以实时更新进度条的进度。
• setCancelable：设置ProgressDialog 是否可以按返回键取消；
• cancelListner:当前Dialog强制取消之后将会被执行，通常用来清理未完成的任务。
• setButton：设置ProgressDialog 的一个Button（需要监听Button事件）；
• show：显示ProgressDialog。
• cancel：删除progressdialog
• dismiss： 删除progressdialog 作用和cancel相同
• set/getMax：设置最大进度条的值
• set/getProgress：更新进度条，当然一般都需要Handler的结合来更新进度条
• incrementProgressBy：增加进度条
• setProgressDrawable：设置progress发生变化时的进度指示条的背景图

测试代码

Mainactivity

public class MainActivity extends ListActivity {
    private ProgressDialog dialog;
    private AlertDialog alertDialog;
    private ProgressDialogFragment dialogFragment;
    private Handler mHandler = new Handler() {
        @Override
        public void handleMessage(android.os.Message msg) {
            switch (msg.what) {
            case 0:
                dialog.cancel();// cancel和dismiss唯一的区别是，调用cancel方法会【回调】OnCancelListener
                break;
            case 1:
                int progress = (Integer) msg.obj;
                if (progress < 20) {
                    dialog.incrementProgressBy(5);// 增加进度条的进度
                    mHandler.sendMessageDelayed(Message.obtain(mHandler, 1, progress + 1), 150);
                } else dialog.dismiss();
                break;
            case 2:
                alertDialog.dismiss();
                break;
            case 3:
                getFragmentManager().beginTransaction().remove(dialogFragment).commit();
                break;
            }
        };
    };
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        String[] array = { "ProgressDialog.STYLE_SPINNER：不确定的圆形滚动条",//
                "ProgressDialog.STYLE_HORIZONTAL：确定的水平滚动条", //
                "通过AlertDialog实现不确定圆形滚动条效果，其View包含一个ProgressBar",//
                "通过DialogFragment实现不确定圆形滚动条效果，其View包含一个ProgressBar", };
        setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, new ArrayList<String>(Arrays.asList(array))));
        Fragment fragment = getFragmentManager().findFragmentByTag("ProgressDialogFragment");
        //旋转屏幕后dialogFragment为空，但是findFragmentByTag的结果不为空，所以dialogFragment将永远不会消失
        if (fragment != null) {
            if (dialogFragment == null) Toast.makeText(MainActivity.this, "dialogFragment为空，findFragmentByTag不为空", Toast.LENGTH_SHORT).show();
            getFragmentManager().beginTransaction().remove(fragment).commit();
        }
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mHandler != null) mHandler.removeCallbacksAndMessages(null);
    }
    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        switch (position) {
        case 0://旋转屏幕后直接消失
            showPD();
            mHandler.sendEmptyMessageDelayed(0, 3000);
            break;
        case 1://旋转屏幕后直接消失
            showHorizontalPD();
            mHandler.sendMessageDelayed(Message.obtain(mHandler, 1, 0), 150);
            break;
        case 2://旋转屏幕后直接消失
            showAlertDialog();
            mHandler.sendEmptyMessageDelayed(2, 3000);
            break;
        case 3://旋转屏幕后会重新创建
            showDialogFragment();
            mHandler.sendEmptyMessageDelayed(3, 3000);
            break;
        }
    }
    private void showPD() {
        dialog = new ProgressDialog(this);
        dialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);//转盘
        dialog.setCancelable(false);
        dialog.setCanceledOnTouchOutside(false);
        dialog.setTitle("提示");
        dialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
            @Override
            public void onDismiss(DialogInterface dialog) {
                Toast.makeText(MainActivity.this, "消失了", Toast.LENGTH_SHORT).show();
            }
        });
        dialog.setMessage("正在加载，请稍后……");
        dialog.show();
    }
    private void showHorizontalPD() {
        dialog = new ProgressDialog(this);
        dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        dialog.setCancelable(true);
        dialog.setCanceledOnTouchOutside(false);
        dialog.setIcon(R.drawable.ic_launcher);//这里指的是标题左侧的图标。注意：如果没有设置title只设置Icon的话，是不会显示图标的  
        dialog.setTitle("提示");
        dialog.setMax(100);
        dialog.setButton(DialogInterface.BUTTON_POSITIVE, "确定…", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, "确定", Toast.LENGTH_SHORT).show();
            }
        });
        dialog.setButton(DialogInterface.BUTTON_NEGATIVE, "取消…", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, "取消", Toast.LENGTH_SHORT).show();
            }
        });
        dialog.setMessage("正在加载，请稍后……");
        dialog.show();
    }
    private void showAlertDialog() {
        alertDialog = new AlertDialog.Builder(this).setView(R.layout.layout).create();
        alertDialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);//设置Dialog背景透明效果
        alertDialog.show();
    }
    private void showDialogFragment() {
        dialogFragment = ProgressDialogFragment.newInstance("加载中…");
        dialogFragment.show(getFragmentManager(), "ProgressDialogFragment");
    }
}

ProgressDialogFragment

public class ProgressDialogFragment extends DialogFragment {
    /**构造时把传入的参数带进来，注意一定要通过Bundle及setArguments传递数据*/
    public static ProgressDialogFragment newInstance(String message) {
        Bundle bundle = new Bundle();//把所有需要传递的数据都放在Bundle中
        bundle.putString("message", message);
        ProgressDialogFragment dialog = new ProgressDialogFragment();
        dialog.setArguments(bundle);//通过setArguments把Bundle传递过去
        return dialog;
    }
    @SuppressLint("InflateParams")
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        View contentView = getActivity().getLayoutInflater().inflate(R.layout.layout, null);
        TextView tv_messag = (TextView) contentView.findViewById(R.id.tv_messag);
        if (getArguments() != null && !TextUtils.isEmpty(getArguments().getString("message"))) {
            tv_messag.setVisibility(View.VISIBLE);
            tv_messag.setText(getArguments().getString("message"));
        } else tv_messag.setVisibility(View.GONE);
        Dialog dialog = new Dialog(getActivity());
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);//设置Dialog没有标题。需在setContentView之前设置，在之后设置会报错
        dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);//设置Dialog背景透明效果
        dialog.setCancelable(false);
        dialog.setContentView(contentView);
        return dialog;
    }
}

2017-02-20