public class MainActivity extends AppCompatActivity {private Button bt;private Button btn;private TextView tv;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        bt = (Button) findViewById(R.id.bt);        btn = (Button) findViewById(R.id.btn);        tv = (TextView) findViewById(R.id.tv);        btn.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                SharedPreferences.Editor editor = getSharedPreferences("data",MODE_PRIVATE).edit();                editor.putString("name","tom");                editor.putInt("age",15);                editor.putBoolean("married",false);                editor.apply();            }        });        bt.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                SharedPreferences sh = getSharedPreferences("data",MODE_PRIVATE);                String name = sh.getString("name","");                int age = sh.getInt("age",0);                Boolean married = sh.getBoolean("married",false);                tv.setText(name);            }        });    }    @Override    protected void onDestroy() {        super.onDestroy();    }}

建议存之前要先清除以前的数据，不论有没有，如果要清除就   editor.clear();

   editor.commit();