Android新手入门教程（七）：理解Activityの显示“稍微复杂”对话框

除了“对话框”进度条，也可以创建一个显示“操作进度”的对话框，例如显示正在下载的状态。

1.创建一个名为Dialog的工程。

2.main.xml中的代码。

[java] view plaincopyprint?<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/btn_dialog3"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:onClick="onClick3"
        android:text="Click to display a detailed progress dialog" />

</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

</LinearLayout> 3.DialogActivity中的代码。

[java] view plaincopyprint?package net.horsttnann.Dialog;

import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInte易做图ce;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class DialogActivity extends Activity {
    ProgressDialog progressDialog;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }

    public void onClick3(View v) {
        showDialog(1);
        progressDialog.setProgress(0);

        new Thread(new Runnable() {
            public void run() {
                for (int i = 1; i <= 15; i++) {
                    try {
                        // ---simulate doing something lengthy---
                        Thread.sleep(1000);
                        // ---update the dialog---
                        progressDialog.incrementProgressBy((int) (100 / 15));
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                progressDialog.dismiss();
            }
        }).start();
    }

    @Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {
        case 1:
            progressDialog = new ProgressDialog(this);
            progressDialog.setIcon(R.drawable.ic_launcher);
            progressDialog.setTitle("Downloading files...");
            progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
            progressDialog.setButton(DialogInte易做图ce.BUTTON_POSITIVE, "OK",
                    new DialogInte易做图ce.OnClickListener() {
                        public void onClick(DialogInte易做图ce dialog,
                                int whichButton) {
                            Toast.makeText(getBaseContext(), "OK clicked!",
                                    Toast.LENGTH_SHORT).show();
                        }
                    });
            progressDialog.setButton(DialogInte易做图ce.BUTTON_NEGATIVE, "Cancel",
   &nb

补充：移动开发 , Android ,