edittext 有个onCreateInputConnection 的方法，通过它可以自定义一个输入法连接器，那里连接器里面有个方法（finishComposingText）能监听输入完成的动作.

public class MyEditText extends EditText{             public MyEditText(Context context) {                  super(context);          }           private OnFinishComposingListener mFinishComposingListener;                     public void setOnFinishComposingListener(OnFinishComposingListener listener){                  this.mFinishComposingListener =listener;          }           @Override          public InputConnection onCreateInputConnection(EditorInfo outAttrs) {                  return new MyInputConnection(super.onCreateInputConnection(outAttrs), false);          }            public class MyInputConnection extends InputConnectionWrapper {                  public MyInputConnection(InputConnection target, boolean mutable) {                          super(target, mutable);                  }                  @Override                 public boolean finishComposingText() {                          boolean finishComposing = super.finishComposingText();                          if(mFinishComposingListener != null){                                  mFinishComposingListener.finishComposing();                          }                          return finishComposing;                  }          }             public interface OnFinishComposingListener{                  public void finishComposing();          }  }