Android中使用ProgressBar实现进度条

[{"title":"（1308个子文件25.7MB）Android中使用ProgressBar实现进度条","children":[{"title":"gradlew.bat <span style='color:#111;'>2.35KB</span>","children":null,"spread":false},{"title":"gradlew <span style='color:#111;'>4.85KB</span>","children":null,"spread":false},{"title":"gradle.properties <span style='color:#111;'>747B</span>","children":null,"spread":false},{"title":"progressBar.iml <span style='color:#111;'>865B</span>","children":null,"spread":false},{"title":"localJarClasspathSnapshot.bin <span style='color:#111;'>19.67KB</span>","children":null,"spread":false},{"title":"......","children":null,"spread":false},{"title":" <span style='color:steelblue;'>文件过多，未全部展示</span>","children":null,"spread":false}],"spread":true}]