//内容可见

mEtPassword.setTransformationMethod(HideReturnsTransformationMethod.getInstance());

//内容不可见

mEtPassword.setTransformationMethod(PasswordTransformationMethod.getInstance());

 

private Button mBtnPassword;	private EditText mEtPassword;	private boolean mbDisplayFlg = false;	    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                mEtPassword = (EditText)findViewById(R.id.password);        mBtnPassword = (Button)findViewById(R.id.btnPassword);        mBtnPassword.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				// TODO Auto-generated method stub				Log.d("AndroidTest", "mbDisplayFlg = " + mbDisplayFlg);				if (!mbDisplayFlg) {					// display password text, for example "123456"					mEtPassword.setTransformationMethod(HideReturnsTransformationMethod.getInstance());				} else {					// hide password, display "."					mEtPassword.setTransformationMethod(PasswordTransformationMethod.getInstance());				}				mbDisplayFlg = !mbDisplayFlg;				mEtPassword.postInvalidate();			}        	        });           }