为什么我编写安卓音乐播放器时总出现cannot be resolved or is not a field这种progream,求大神指教

Question

老是提示
Description Resource Path Location Type
The import android.app.Activity is never used MainActivity.java /IMusic/src/com/example line 8 Java Problem
[I18N] Hardcoded string "音乐播放器", should use @string resource main.xml /IMusic/res/menu line 10 Android Lint Problem
main cannot be resolved or is not a field MainActivity.java /IMusic/src/com/example line 34 Java Problem
filename cannot be resolved or is not a field MainActivity.java /IMusic/src/com/example line 36 Java Problem
[I18N] Hardcoded string "打开一个activity", should use @string resource main.xml /IMusic/res/menu line 48 Android Lint Problem
playButton cannot be resolved or is not a field MainActivity.java /IMusic/src/com/example line 74 Java Problem
pauseButton cannot be resolved or is not a field MainActivity.java /IMusic/src/com/example line 84 Java Problem
[I18N] Hardcoded string "pugongying.mp3", should use @string resource main.xml /IMusic/res/menu line 15 Android Lint Problem
continues cannot be resolved or is not a field MainActivity.java /IMusic/src/com/example line 88 Java Problem
pauseButton cannot be resolved or is not a field MainActivity.java /IMusic/src/com/example line 93 Java Problem
resetButton cannot be resolved or is not a field MainActivity.java /IMusic/src/com/example line 97 Java Problem
stopButton cannot be resolved or is not a field MainActivity.java /IMusic/src/com/example line 106 Java Problem
[I18N] Hardcoded string "pugongying.mp3", should use @string resource activity_main.xml /IMusic/res/layout line 15 Android Lint Problem
[I18N] Hardcoded string "打开一个activity", should use @string resource activity_main.xml /IMusic/res/layout line 48 Android Lint Problem
The markup in the document following the root element must be well-formed. main.xml /IMusic/res/menu line 52 Android XML Format Problem
OtherActivity cannot be resolved to a type MainActivity.java /IMusic/src/com/example line 138 Java Problem
Don't include android.R here; use a fully qualified name for each usage instead MainActivity.java /IMusic/src/com/example line 3 Android Lint Problem
[I18N] Hardcoded string "音乐播放器", should use @string resource activity_main.xml /IMusic/res/layout line 10 Android Lint Problem
This text field does not specify an inputType or a hint activity_main.xml /IMusic/res/layout line 11 Android Lint Problem
Expected duration Toast.LENGTH_SHORT or Toast.LENGTH_LONG, a custom duration value is not supported MainActivity.java /IMusic/src/com/example line 81 Android Lint Problem
望大神帮忙啊

Answer 1

是不是 R 文件的包导错了 看了你导入的 android.R 的包

Answer 2

我也有这个问题，不知楼主是否解决了