Android 基於幀布局實現一個進度條 FrameLayout+ProgressBar

標籤：

在FrameLayout中添加一個ProgressBar置中

<ProgressBar        android:layout_gravity="center"        android:id="@+id/progressBar1"        style="?android:attr/progressBarStyleLarge"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />

添加一個TextView置中

<TextView        android:layout_gravity="center"        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="0%" />

該程式實現了一個跑動的進度條，使用了多線程，參考自：http://www.cnblogs.com/tyjsjl/p/4014285.html

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    >    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="使用幀布局(FrameLayout)實現一個ProgressBar的動態效果" />    <ProgressBar        android:layout_gravity="center"        android:id="@+id/progressBar1"        style="?android:attr/progressBarStyleLarge"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <TextView        android:layout_gravity="center"        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="0%" /></FrameLayout>

activity_main.xml

package com.example.runprogressbar;import java.util.Timer;import java.util.TimerTask;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.support.v7.app.ActionBarActivity;import android.widget.TextView;public class MainActivity extends ActionBarActivity {        private TextView textView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                textView = (TextView) findViewById(R.id.textView1);        new Thread(new MyThread()).start();    }        Handler handler = new Handler() {        public void handleMessage(Message msg) {            textView.setText(msg.what + "%");        }    };        class MyThread implements Runnable {                private int percentNum = 0;        @Override        public void run() {            while (true) {                try {                    Thread.sleep(1000);                    Message msg = new Message();                    msg.what = ++percentNum;                    handler.sendMessage(msg);                    if (percentNum >= 100)                        break;                } catch (InterruptedException e) {                    e.printStackTrace();                }                            }        }            }}

MainActivity.java

 效果：

Android 基於幀布局實現一個進度條 FrameLayout+ProgressBar