Android App performance optimization

Problems encountered:

1) ANR

2) ListView, not smooth

3) activity start slow

4) animation is not smooth, pre-start stalling

5) Custom View start slow

6) OOM

7) Large number of database operations

8) The program slows down after a long running time

Basic idea:

1) The language layer solves the problem and improves the performance in syntax

2) Reasonable data structure and algorithm

3) Layout optimization, layout depth control

4) worker threads are detached from the UI thread

5) A reasonable caching mechanism

6) Reasonable use of NDK

7) Optimized SQL statements

8) Use tools to analyze problems to find bottlenecks

Optimization Tools:

View Optimization tool: Hierarchy view

Code optimization Tool: Lint

Memory, method Optimization tools: Heap, TraceView

Dalvik log analysis, logcat log analysis

The "Over-drawing" option for Android phone developer options.