4 Data(2)

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4 Data(2)

SharedPreferences

  • 保存数据(onCreate方法内)
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    Button saveData = findViewById(R.id.save_data);
            saveData.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", 28);
                    editor.putBoolean("married", false);
                    editor.apply();
                }
            });
  • 读取数据(onCreate方法内)
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    Button restoreData = findViewById(R.id.restore_data);
            restoreData.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    SharedPreferences pref = getSharedPreferences("data", MODE_PRIVATE);
                    String name = pref.getString("name", ""); // 通过键读取值
                    int age = pref.getInt("age", 0);
                    boolean married = pref.getBoolean("married", true);
                    Log.i("---", "name "+name);
                    Log.i("---", "age "+age);
                    Log.i("---", "married "+married);
                }
            });